Do Nasturtiums Vine?

When you picture a garden full of bright orange, red, and yellow blooms tumbling over fences and spilling from hanging baskets, there is a good chance nasturtiums are part of that scene. These fast-growing, cheerful plants belong to the genus Tropaeolum, and they behave in ways that surprise many first-time growers. Some types stay compact and bushy, barely reaching a foot tall. Others send out long, wandering stems that scramble across the ground, climb up trellises, and drape gracefully over container edges.

The way a nasturtium grows depends almost entirely on which variety you plant. And this is where the confusion usually starts. Seed packets, garden center labels, and online descriptions use different words to describe the same growth habits. You will see terms like trailing, climbing, vining, bushy, compact, and dwarf tossed around freely, sometimes for the same plant. Making sense of these labels and understanding what your particular nasturtium will actually do in your garden takes a closer look at the different types available, how their stems behave, and what kind of support or space they need to thrive.

Nasturtiums are one of the easiest flowers to grow from seed, which is part of their enormous appeal. They tolerate poor soil, laugh at neglect, and produce edible flowers and leaves with a peppery kick that livens up salads. But choosing the right type for your space, whether that is a small balcony pot, a raised bed border, or a sprawling garden fence, starts with understanding how each variety wants to grow. That knowledge saves you from ending up with a plant that overtakes your tomatoes when you wanted a tidy border, or one that stays stubbornly short when you dreamed of a flowering curtain cascading from a window box.

How Many Types of Nasturtiums Are There?

There are roughly 80 species within the Tropaeolum genus, but most gardeners work with just two main species: Tropaeolum majus and Tropaeolum minus. The vast majority of named varieties you find in seed catalogs and nurseries are cultivars or hybrids developed from these two species.

Tropaeolum majus is the larger, more vigorous species. It produces the long stems that can reach 6 to 10 feet or more under good conditions. This is the species responsible for the sprawling, rambling nasturtiums that cover fences and arbors throughout the summer.

Tropaeolum minus is the compact cousin. It stays short, typically reaching 12 to 18 inches tall, and forms a rounded, mounding shape. These are the nasturtiums you see used as edging plants or tucked into the front of garden borders.

Beyond these two, a handful of other species show up occasionally in specialty catalogs:

• Tropaeolum peregrinum (canary creeper) — a true climbing species with small, fringed yellow flowers
• Tropaeolum speciosum (flame nasturtium) — a perennial climber with striking red flowers, popular in the UK
• Tropaeolum tuberosum (mashua) — grown primarily as a root vegetable in the Andes

For everyday garden use, the cultivars bred from T. majus and T. minus dominate the market. Seed companies have developed hundreds of named varieties over the years, selecting for flower color, plant size, leaf pattern, and growth habit. This is where the labels get interesting and where understanding the differences really matters.

What Does "Trailing" Mean for Nasturtiums?

When a seed packet says a nasturtium is trailing, it means the plant produces long, flexible stems that grow outward and downward rather than standing upright. A trailing nasturtium will not hold itself up like a sunflower or a tomato plant. Instead, the stems sprawl along the ground, drape over the edges of containers, or scramble through nearby plants looking for something to lean on.

Trailing growth is different from true climbing in an important way. True climbers like morning glories and sweet peas have specialized structures, tendrils or twining stems, that actively grip and wrap around supports. Trailing nasturtiums do not have tendrils. Their stems are smooth, round, and fleshy. They rely on their leaf petioles (the slender stalks connecting leaves to stems) to loosely wrap around whatever they encounter. This wrapping action is gentle and not very strong. Left unsupported, a trailing nasturtium simply flops along the ground, spreading outward in all directions.

Think of it this way. A morning glory will climb a string on its own. A trailing nasturtium needs a bit more help. You might need to gently weave the stems through a trellis or tie them loosely to a support with soft twine. Once guided, they hold their position reasonably well. But they will never grip as aggressively as a dedicated climber.

This trailing habit is what makes nasturtiums so versatile. The same plant that scrambles along the ground as a living mulch under your tomatoes can also be trained up a fence or allowed to cascade from a raised planter. The growth habit stays the same. Only the direction changes based on how you position and support the stems.

Some characteristics of trailing nasturtium stems:

• Fleshy and succulent-like — they snap easily if bent too sharply
• Round in cross-section — no ridges or rough surfaces for gripping
• Branching freely — each stem produces side branches that extend the spread
• Long-lived through the season — individual stems can keep growing for months in mild climates
• Capable of rooting at nodes — stems that contact moist soil sometimes develop roots at the leaf joints

Which Nasturtium Varieties Grow the Longest?

If you want the maximum length and the most dramatic draping or climbing effect, several well-known varieties stand out for their vigorous trailing stems. These are the varieties that earn nasturtiums their reputation as garden scramblers capable of covering surprising amounts of ground in a single season.

Tall Trailing Mix is one of the most widely available options. This classic seed mix typically includes several colors, orange, red, yellow, mahogany, and cream, all on plants that send out stems reaching 8 to 12 feet under favorable conditions. The flowers are large, up to 2.5 inches across, and the round, lily-pad-shaped leaves can be as wide as a tea saucer.

Spitfire is a named variety known for its brilliant scarlet-orange flowers and strong trailing growth. It typically reaches 6 to 8 feet and makes an excellent choice for a garden trellis or fence covering.

Jewel of Africa is a variegated-leaf trailing variety that adds an extra visual layer. The leaves are splashed with cream and white markings, making them attractive even before the flowers appear. Stems reach 6 to 8 feet, and the flowers come in a range of warm colors.

Canary Creeper (Tropaeolum peregrinum) deserves a mention here even though it is technically a different species. This annual climber produces small, bright yellow flowers with fringed petals that look like tiny birds in flight. It is a true twining climber rather than a trailer, and it reaches 8 to 12 feet easily, sometimes more. If you specifically want a nasturtium relative that climbs vigorously on its own, this one delivers.

For comparison, here is how some popular trailing varieties stack up:

What Makes Some Nasturtiums Stay Small and Bushy?

On the opposite end of the spectrum, dwarf and compact nasturtium varieties are bred specifically to stay short and mounded. These plants produce the same beautiful flowers and round leaves, but their stems remain short and self-supporting, forming dense little bushes rather than long trailing runners.

The difference comes down to genetics and selective breeding. Over decades, plant breeders have chosen the most compact individual plants from each generation, saving their seeds and replanting them, gradually developing varieties with shorter internodes (the spaces between leaves along the stem) and a more restrained growth habit.

Popular compact varieties include:

• Alaska Mix — perhaps the best-known dwarf nasturtium, prized for its variegated cream-and-green leaves and mixed flower colors. Stays around 12 inches tall.
• Whirlybird Series — produces semi-double flowers that face upward rather than hanging down, in a wide range of colors. Grows 10 to 14 inches tall.
• Empress of India — an heirloom variety with dark blue-green leaves and deep crimson-scarlet flowers. Stays compact at about 12 inches.
• Tom Thumb Mix — true miniatures reaching just 8 to 10 inches, perfect for the smallest containers and window boxes.

These compact types are ideal for:

• Edging along walkways and garden beds
• Small pots and window box planters
• Interplanting among vegetables without crowding
• Front-of-border plantings in flower beds
• Indoor growing on a sunny windowsill

One important note: even "compact" nasturtiums can get a bit leggy and sprawling if grown in too much shade or overly rich soil. The bushy habit is most pronounced when the plant gets plenty of sun and grows in lean, well-drained ground. Over-fertilizing, especially with nitrogen-heavy feeds, pushes leaf growth at the expense of flowers and encourages longer, floppier stems even in dwarf varieties.

Do Nasturtiums Actually Climb on Their Own?

This is where the heart of the question really lies, and where the behavior of these plants gets genuinely interesting. The answer unfolds a bit differently than most people expect.

Trailing nasturtiums can climb, but they do it loosely and with some help. Unlike dedicated climbing plants such as clematis, sweet peas, or ivy, nasturtiums lack the specialized equipment that true climbers use. They have no tendrils, no aerial roots, no suction cups, and no strongly twining stems. What they do have are those long, flexible leaf petioles that can coil partway around thin supports like strings, wires, or small-diameter branches.

When a trailing nasturtium stem encounters a support, the petioles of nearby leaves will curl loosely around it. This holds the stem in place well enough to allow it to continue growing upward, producing more leaves and flowers as it goes. Over time, multiple petioles gripping the same support create a reasonably secure attachment. But the hold is never as firm as what you would get from a twining vine like a bean or a morning glory.

In practical terms, this means that trailing nasturtiums work best on supports with lots of thin, closely spaced elements for the petioles to grab. A trellis with a fine mesh, a string net, or a chain-link fence provides many attachment points and allows the plant to scramble upward effectively. A smooth wall, a single thick post, or a widely spaced lattice offers much less for the petioles to grip, and the plant will tend to flop away from the support rather than climbing it.

So, to put it plainly and naturally: certain nasturtium varieties absolutely produce long, vine-like stems that behave in a way most gardeners would call vining. They sprawl, they trail, they scramble, and with a little guidance and the right support structure, they climb. But the climbing is more of a gentle scramble than an aggressive ascent. Think of a nasturtium on a trellis as a friendly neighbor leaning on a fence for a chat, not a mountaineer scaling a cliff.

The distinction matters when you are planning your garden. If you want a plant that will race up a bare wall without any help, a nasturtium is not the right choice. But if you want a plant that will happily cover a mesh trellis, weave through a chain-link fence, tumble over a retaining wall, or cascade from a hanging basket, trailing nasturtiums do all of those things beautifully.

How Do You Train Nasturtiums to Climb a Trellis?

Getting your trailing nasturtiums to grow upward rather than outward takes a little guidance at the start, but once they get going, they mostly take care of themselves. Here is how to set things up for success:

1. Choose the right support structure. A trellis with openings no larger than 4 to 6 inches works well. String netting, wire mesh, bamboo lattice, or even a homemade frame of crisscrossed twine gives the leaf petioles plenty of places to grab hold. Avoid supports with thick bars and wide gaps.

2. Plant seeds or transplants at the base of the support. Sow seeds directly about 1 inch deep and 10 to 12 inches apart, right at the foot of the trellis. Nasturtiums resent root disturbance, so direct sowing is usually more successful than transplanting.

3. Wait for stems to reach the support. Young nasturtium stems grow outward along the ground initially. Once they are long enough to reach the trellis, they will begin encountering the support on their own.

4. Gently guide the first few stems. When stems are 8 to 12 inches long, carefully lift them and weave them through the lower portion of the trellis. Tuck leaf petioles around the trellis wires or strings. You can use soft plant ties or small clips to hold stems in place until the petioles grip on their own.

5. Check in weekly and redirect as needed. As the plant grows, some stems will find their own way up the trellis. Others will try to wander sideways or head back toward the ground. Simply redirect these stems upward and weave them into the support.

6. Allow side branches to fill in the gaps. Trailing nasturtiums branch freely, and each branch can produce its own flowers. As the main stems climb, side branches will fill in the spaces between them, eventually creating a dense screen of foliage and flowers.

7. Water at the base, not overhead. This keeps the foliage dry and reduces the risk of fungal problems. It also encourages roots to grow deep and strong, supporting the weight of the climbing stems.

By midsummer, a well-trained trailing nasturtium can cover a 4-by-6-foot trellis with a dense mass of rounded leaves and bright flowers. The effect is stunning and attracts a steady stream of pollinators, especially hummingbirds, which love the tubular flower shape.

Can Nasturtiums Be Used as Ground Cover?

Absolutely. In fact, ground cover is one of the most popular and practical uses for trailing nasturtiums. When allowed to spread without a vertical support, trailing varieties form a dense, leafy mat that covers bare soil quickly and effectively.

A single trailing nasturtium plant can spread to cover 6 to 10 square feet of ground during a growing season. Plant several together with 18 to 24 inches of spacing, and they knit together into a continuous carpet of foliage within a couple of months.

Benefits of using trailing nasturtiums as ground cover:

• Weed suppression — the dense leaf canopy shades the soil and prevents many weed seeds from germinating
• Soil moisture retention — the living mulch reduces evaporation from the soil surface
• Erosion control — on gentle slopes, the spreading stems and roots help hold soil in place
• Pest management — nasturtiums are well-known trap crops that attract aphids away from more valuable plants like beans, squash, and roses
• Pollinator support — the abundant flowers feed bees, butterflies, and hummingbirds throughout the season
• Edible landscaping — every part of the nasturtium above ground is edible, so your ground cover doubles as a salad ingredient

The trap crop function deserves special attention. Many experienced vegetable gardeners deliberately plant trailing nasturtiums around the borders of their beds or between rows of crops. Aphids are strongly attracted to nasturtiums and will often colonize them in preference to nearby vegetables. While this means your nasturtiums may get aphid-covered by midsummer, the trade-off is that your tomatoes, peppers, and beans stay cleaner.

Some gardeners take the companion planting approach further by planting nasturtiums near fruit trees, along the edges of potato patches, and among squash and cucumber plants. The sprawling stems fill in the empty spaces between crop plants without competing aggressively for nutrients, since nasturtiums actually prefer poor soil and too much fertility makes them produce all leaves and few flowers.

What Kind of Soil Do Nasturtiums Prefer?

Here is one of the great ironies of nasturtium growing: the worse your soil is, the better your nasturtiums might perform. These plants genuinely prefer lean, somewhat poor soil over the rich, heavily amended beds that most garden flowers love.

In soil that is too fertile, especially soil high in nitrogen, nasturtiums respond by producing enormous quantities of lush, dark green foliage at the expense of flowers. You end up with a big, leafy plant that barely blooms. For a plant grown primarily for its flowers, this is a disappointing outcome.

The ideal soil for nasturtiums is:

• Well-drained — they do not tolerate waterlogged roots
• Sandy or loamy — heavy clay soil should be lightened with sand or perlite
• Low to moderate fertility — do not add compost or fertilizer to the planting area
• Slightly acidic to neutral pH — between 6.0 and 7.0 works well
• Not too dry — while they tolerate lean soil, they do need consistent moisture during germination and establishment

If your garden soil is naturally rich, you can still grow nasturtiums successfully. Just skip the fertilizer entirely and avoid planting them in beds that have been heavily composted. Container growing gives you complete control over the soil mix. A basic blend of garden soil and perlite in roughly equal parts creates a lean, well-draining medium that nasturtiums love.

One mistake new growers often make is adding fertilizer when their nasturtiums look "hungry" or when growth seems slow early in the season. Resist this urge. Nasturtiums are slow starters in cool weather, and they take off rapidly once temperatures warm up. Feeding them just shifts energy from flower production to leaf production, which is the opposite of what most growers want.

When Is the Best Time to Plant Nasturtiums?

Nasturtiums are warm-season annuals that do not tolerate frost. The seeds germinate best in soil that has warmed to at least 55°F (13°C), and the plants grow fastest when daytime temperatures are between 65°F and 80°F (18°C to 27°C).

The planting timeline varies by region:

For the fastest flowers, some gardeners start seeds indoors 2 to 3 weeks before the last frost date. However, nasturtiums have a taproot that resents disturbance, so indoor starting requires careful handling. Use biodegradable pots like peat pots or newspaper cups that can go directly into the ground without removing the seedling from its container.

Direct sowing is simpler and usually produces equally good results, just a couple of weeks later. Push seeds about 1 inch deep into the soil, water them in, and wait. Germination takes 7 to 14 days in warm soil. In cooler conditions, it may take up to 3 weeks.

A practical tip: soaking seeds in room-temperature water for 8 to 12 hours before planting softens the hard outer seed coat and can speed germination by several days. Some growers go a step further and gently nick the seed coat with a nail file before soaking, though this is not strictly necessary for most seeds.

How Much Sun Do Nasturtiums Need?

Full sun produces the most flowers on nasturtium plants. That means at least 6 to 8 hours of direct sunlight per day. In hot climates (Zones 9 and above), some afternoon shade actually helps prevent the plants from wilting during the hottest part of the day, especially during midsummer heat waves.

Here is how light levels affect growth:

• Full sun (8+ hours): Maximum flower production, compact growth, vibrant colors
• Partial sun (4-6 hours): Moderate flowering, slightly leggier growth, still attractive
• Partial shade (2-4 hours): Reduced flowering, noticeably longer and floppier stems, more foliage
• Full shade (less than 2 hours): Poor performance overall, sparse flowering, weak stems

For trailing varieties intended for climbing, full sun is especially important. The stems need strong light to develop the strength and thickness needed to support themselves on a trellis. Shade-grown trailing nasturtiums produce thinner, weaker stems that are more prone to breaking under their own weight.

For compact varieties in containers, a south-facing or west-facing position provides the intense light they prefer. Rotating containers a quarter turn every week or so prevents the plant from leaning strongly toward the light source and maintains a balanced shape.

One underappreciated factor is reflected light and heat. Nasturtiums planted near light-colored walls, pavement, or stone structures benefit from the extra reflected warmth and light, which can boost both growth and flowering. This makes them excellent choices for planting along the base of south-facing fences and walls, where they get both direct sun and reflected warmth.

Are Nasturtiums Annuals or Perennials?

In most climates, nasturtiums are grown as warm-season annuals. They complete their life cycle in a single growing season, from seed to flower to seed production, and then die when frost arrives or when summer heat becomes too intense.

However, in frost-free regions, some nasturtium species can behave as short-lived perennials or self-seeding annuals that return year after year. In parts of coastal California, southern Florida, and Hawaii, nasturtiums may persist through mild winters and continue growing into a second or third year. In these climates, trailing varieties can become quite large, with woody stem bases and extensive networks of branches.

Self-seeding is another way nasturtiums "come back." The large, round seeds fall to the ground as they ripen, and if conditions are right, they germinate the following spring without any help from the gardener. In mild climates, this self-seeding habit can make nasturtiums seem perennial even though individual plants are technically annual.

In colder climates where frost kills the plants each fall, you have two options for next year:

• Save seeds from your best plants and replant them the following spring
• Allow self-seeding by leaving some spent flowers on the plants at the end of the season so seeds can drop and overwinter in the soil

Saved seeds remain viable for several years if stored in a cool, dry place. Tuck them into a paper envelope, label it with the variety name and year, and store it in a drawer or jar until planting time.

What Pests and Problems Affect Nasturtiums?

Despite their toughness, nasturtiums face a few common issues that are worth knowing about.

Aphids are far and away the most common pest. These tiny sap-sucking insects love nasturtiums, congregating on stems, leaf undersides, and flower buds. A moderate aphid population is actually useful if you are growing nasturtiums as a trap crop, since the aphids are feeding on the nasturtiums instead of your vegetables. Heavy infestations can be managed with a strong spray of water from a hose, which knocks aphids off the plant. Ladybugs and lacewings are natural predators that help control aphid populations.

Cabbage white caterpillars sometimes feed on nasturtium leaves, since nasturtiums are in the same order (Brassicales) as cabbages and their relatives. Hand-picking caterpillars is effective for small infestations.

Black bean aphids are a different aphid species that sometimes colonizes nasturtiums, forming dense black clusters on stems and growing tips. Treatment is the same as for green aphids: water spray, beneficial insects, or insecticidal soap if needed.

Powdery mildew can appear in late summer, especially during humid weather or when air circulation is poor. White, powdery patches develop on the leaves. Improving air circulation by thinning crowded stems and watering at the base rather than overhead helps prevent this problem.

Leaf miners create winding trails inside the leaves where their larvae tunnel between the upper and lower leaf surfaces. Affected leaves are unsightly but the damage is usually cosmetic. Remove badly affected leaves and discard them away from the garden.

Heat stress is not a pest but a common issue in hot climates. When temperatures consistently exceed 90°F (32°C), nasturtiums often stop flowering and look wilted during the afternoon. Morning sun with afternoon shade helps, and plants usually recover and resume blooming when temperatures moderate in early fall.

Can You Eat Nasturtium Flowers and Leaves?

Every part of the nasturtium plant above ground is edible, and eating nasturtiums is one of the great pleasures of growing them. The flavor is peppery and slightly spicy, similar to watercress or arugula. This makes sense botanically, since nasturtiums share their order with mustard family plants.

Here is what each part tastes like and how to use it:

• Flowers: Mild peppery flavor with a slightly sweet nectar at the base. Used whole as a salad garnish, stuffed with herbed cream cheese as an appetizer, or frozen into ice cubes for summer drinks.
• Leaves: Stronger peppery flavor than the flowers, especially older leaves. Used in salads, as wraps for fillings, or chopped and added to pesto in place of some of the basil.
• Seeds (green, unripe): Intensely peppery. Can be pickled in vinegar to make "poor man's capers," a traditional preparation that dates back centuries.
• Stems: Edible but tough and fibrous. Usually not the preferred part for eating.

When harvesting nasturtiums for eating, pick flowers and leaves in the morning after the dew has dried but before the heat of the day causes wilting. Rinse them gently in cool water and shake dry. Check flowers carefully for insects, especially aphids and small spiders, before serving.

Nasturtiums are rich in vitamin C and contain compounds called glucosinolates, the same sulfur-containing chemicals that give mustard and horseradish their bite. Some herbalists use nasturtium tea as a traditional remedy, though the primary appeal for most people is culinary.

A word of caution: only eat nasturtiums that have not been treated with pesticides or chemical fertilizers. If you grow them organically and manage pests with water sprays and beneficial insects, you can harvest and eat with confidence.

How Do Nasturtiums Compare to Other Common Climbing Annuals?

If you are deciding between nasturtiums and other annual vines for your garden, a comparison helps clarify where nasturtiums shine and where other plants might serve you better.

Nasturtiums have a unique advantage as a combination ornamental and edible plant that also functions as a companion plant and trap crop. No other common annual vine offers quite this combination of uses. They also have the advantage of thriving in poor soil where other flowering vines would struggle.

On the other hand, if you need a vigorous self-climber that will cover a tall structure quickly and independently, morning glories or scarlet runner beans are faster and more aggressive climbers. They require less guidance and support management than trailing nasturtiums.

What Are Some Creative Ways to Grow Nasturtiums?

Beyond the standard garden bed planting, nasturtiums lend themselves to some genuinely creative growing arrangements. Their flexibility, both physical and in terms of growing conditions, makes them adaptable to all kinds of settings.

Living curtain: String a grid of twine or fishing line from the eaves of a porch or pergola down to ground-level anchor points. Plant trailing nasturtiums at the base and guide the stems up the strings. By midsummer, you have a flowering curtain that provides shade, privacy, and a constant show of blooms.

Hanging basket cascade: Plant two or three trailing nasturtium seeds in a large hanging basket filled with a well-draining potting mix. As the stems grow, they cascade downward in a colorful waterfall of flowers and round leaves. This works especially well on covered porches and balconies.

Stump or log cover: If you have an old tree stump or log pile that you want to disguise, plant trailing nasturtiums around the base. The stems scramble over and around the wood, transforming an eyesore into a focal point.

Edible flower border: Line a vegetable garden path with compact nasturtium varieties. The flowers add color to the productive garden, attract pollinators to your vegetable crops, and provide a steady harvest of edible blooms and leaves for the kitchen.

Container tower: Stack three or four pots of decreasing size to create a tiered planter. Plant trailing nasturtiums in the top pot and compact varieties in the lower ones. The trailing stems from the top cascade down over the lower pots, creating a tower of flowers.

Chain-link fence cover: If you have a chain-link fence that you want to soften, trailing nasturtiums are an excellent seasonal solution. The closely spaced links of the fence provide perfect attachment points for the leaf petioles, and the plants cover the fence quickly without causing any permanent attachment or damage.

Mixed hanging basket with herbs: Combine trailing nasturtiums with other trailing herbs like oregano and thyme in a large hanging basket near the kitchen door. Everything in the basket is edible, and the nasturtium flowers add bright color among the herb foliage.

How Do You Save Nasturtium Seeds for Next Year?

Saving seeds from your favorite nasturtiums is easy and rewarding. The seeds are large, round, and hard, making them simple to collect and store.

1. Allow flowers to fade naturally. Do not deadhead every spent bloom if you want seeds. After pollination, each flower produces one to three large seeds at the base of the stem where the flower was attached.

2. Watch for seed development. The seeds start green and soft, growing larger over several weeks. As they mature, they turn from green to tan or brown and become hard and dry.

3. Collect seeds when they are brown and dry. Mature seeds detach easily from the plant. You can pick them directly or spread a cloth under the plant and shake the stems gently to catch dropping seeds.

4. Let collected seeds dry fully. Spread them on a paper towel or newspaper in a warm, dry location for a week or two. This ensures any remaining moisture evaporates before storage.

5. Store in a cool, dry place. Paper envelopes, small glass jars, or sealed containers with a silica gel packet all work well. Label with the variety name and harvest year. Store in a cool drawer, closet, or refrigerator.

6. Test viability before planting. Seeds stored properly remain viable for 3 to 5 years, sometimes longer. To test, soak a few seeds in water for 12 hours before the planting season. Seeds that swell and begin to crack open are still good. Seeds that remain hard and unchanged may have lost viability.

A single healthy trailing nasturtium plant can produce dozens of seeds over the course of a season, giving you plenty for next year's garden and some to share with friends.

Do Nasturtiums Come Back Every Year?

For gardeners in most climate zones, nasturtiums behave as annuals that need replanting each spring. Frost kills the plants, and they do not have underground structures like bulbs or rhizomes that survive winter dormancy in cold soil.

However, there are several ways nasturtiums can seem to return on their own:

• Self-seeding in mild climates (Zones 8 and above) often produces volunteer seedlings the following spring. These appear where seeds fell the previous year and can give the impression that the plants came back on their own.
• Overwintering in frost-free zones (Zones 10 and above) allows some plants to persist as short-lived perennials for two or three seasons before declining.
• Indoor overwintering is possible if you bring potted nasturtiums inside before frost and provide a bright, cool window. The plants may go semi-dormant but can resume growth in spring when moved back outdoors.

Most gardeners find it simpler and more rewarding to start fresh from seed each year. Nasturtium seeds are inexpensive, germinate readily, and grow fast enough to produce flowers within 6 to 8 weeks of planting. Starting fresh also gives you the opportunity to try new varieties, colors, and combinations each season.

What Are the Best Companion Plants for Nasturtiums?

Nasturtiums play well with a wide range of garden plants, and their reputation as beneficial companions is well earned. Here are some of the best pairings:

• Tomatoes — nasturtiums planted nearby may repel whiteflies and serve as aphid traps, keeping these pests off the tomato plants
• Cucumbers and squash — the sprawling nasturtium stems fill in gaps around these large-leaved crops and attract pollinators
• Beans and peas — nasturtiums attract beneficial insects that prey on bean pests
• Roses — many rose gardeners plant nasturtiums at the base of rose bushes as aphid traps
• Fruit trees — trailing nasturtiums make excellent ground cover under fruit trees, suppressing weeds and attracting pollinators
• Radishes — interplanting with radishes can help deter flea beetles
• Marigolds — a classic companion pairing that creates a riot of warm color while providing multiple pest management benefits

Avoid planting nasturtiums very close to plants that need rich, heavily fertilized soil, like heavy-feeding brassicas or corn. The nasturtiums will thrive in the lean spaces between your richer plantings, serving as colorful, functional fillers that earn their place in the garden through both beauty and practical benefit.

Growing these plants, whether you let them trail along the ground, cascade from containers, or scramble up a trellis, brings a combination of color, food, and ecological benefit that few other garden flowers can match. The stems keep growing, the flowers keep blooming, and every week through summer brings a new wave of bright blossoms that make you glad you planted them.