How Long Does It Take Red Cabbage to Grow?

Red cabbage typically takes 70 to 100 days to grow from seed to harvest. Some quick-growing varieties can be ready in as few as 60 days, while larger late-season types may need up to 120 days. The exact time depends on the variety, your local weather, soil quality, and the care you give your plants.

How long does it take for red cabbage to grow from seed?

If you start red cabbage from seed, the total time from sowing to picking a full head is generally 70 to 100 days. Here is a quick breakdown of the growth stages:

Stage	Time Needed	Notes
Seed germination	5 to 10 days	Seeds sprout best at 60–70°F soil temperature
Seedling growth (transplant size)	4 to 6 weeks	Seedlings develop 4–6 true leaves before transplanting
Head formation and maturing	50 to 80 days	This is the longest stage; heads grow and firm up

The total days on a seed packet usually refer to the time from transplanting (or direct sow) to harvest. If you start seeds indoors, add the seedling stage to your total.

What factors affect how quickly red cabbage grows?

Several things can make your red cabbage grow faster or slower. The most important ones are:

Temperature – Red cabbage loves cool weather (60–70°F). Hot weather above 80°F slows growth and can cause bolting (flowering too early).
Soil quality – Rich, well-draining soil with plenty of organic matter helps roots grow strong. A soil pH between 6.0 and 6.5 is ideal.
Water – Consistent moisture (about 1–1.5 inches per week) is critical. Dry soil stops growth, while soggy soil leads to rot.
Sunlight – At least 6 hours of direct sun per day gives the plant energy to form a large head.
Spacing – Crowded plants compete for nutrients and water. Space red cabbage 12–24 inches apart, depending on variety size.
Pests and diseases – Aphids, cabbage worms, and clubroot can set a plant back weeks.

How can I make red cabbage grow faster?

While you can't rush Mother Nature, you can take steps to help your red cabbage reach maturity on schedule (or even a few days early).

Start seeds indoors – Planting seeds indoors 4–6 weeks before the last frost gives you a head start. Use a good seed-starting mix and keep the soil warm.
Use transplants – Buying young plants from a nursery can shave 4–6 weeks off the total time.
Prepare the soil well – Mix in compost or well-rotted manure before planting. A balanced 10-10-10 slow-release fertilizer applied at planting gives steady nutrition. (Check out slow-release fertilizer options on Amazon.)
Mulch around plants – A layer of straw or grass clippings keeps soil cool and moist, which helps roots keep growing.
Water deeply and regularly – Avoid letting the soil dry out completely. A soaker hose or drip irrigation works well.
Protect from extreme heat – In warmer climates, plant in fall or use shade cloth during heat waves.

When is the best time to plant red cabbage for a fast harvest?

The timing of planting affects how many days your cabbage takes to mature. Red cabbage is a cool-season crop, so planting at the right time avoids stress.

Spring planting: Set out transplants 2–3 weeks before the last expected frost. If you direct sow, do it as soon as the soil can be worked in early spring. Days to harvest will be shorter because cool spring weather encourages steady growth.

Fall planting: Sow seeds or set out transplants 6–8 weeks before the first fall frost. The days may be a bit longer because growth slows as days shorten, but the quality is often excellent.

Using transplants from a nursery is the quickest way. If you start your own, a seed starting kit (available on Amazon) gives you clean trays, covers, and a heat mat to speed up germination.

How do I know when red cabbage is ready to harvest?

Harvesting at the right time gives you the best flavor and texture. Here is a simple checklist to use:

The head feels hard and solid when you squeeze it gently – not soft or loose.
The head is deep purple or red (depending on the variety) and the outer leaves wrap tightly around it.
The head has reached the expected size – typically 6 to 10 inches across for most varieties.
The bottom of the head looks full; there are no gaps or spaces near the stalk.

If you wait too long, the head may split open (crack), especially after heavy rain. Split heads are still edible but can attract pests and are less attractive. Cut the head off at the base with a sharp knife, leaving the outer leaves and root in the ground if you want a second small harvest.

What are common problems that slow down red cabbage growth?

Even if you do everything right, some issues can delay your cabbage. Knowing what to watch for helps you act fast.

Aphids – Tiny green insects that suck sap from leaves. They slow growth and can spread disease. Blast them off with water or use insecticidal soap.
Cabbage worms – Caterpillars that eat large holes in leaves. Pick them off by hand or use floating row covers to keep butterflies away. (Shop for insect netting on Amazon.)
Clubroot – A soil disease that causes swollen, deformed roots. It stunts the whole plant. Prevent it by rotating crops and keeping soil pH above 6.5.
Nutrient deficiencies – Yellow or stunted leaves often mean a lack of nitrogen or boron. A side-dressing of compost or a balanced fertilizer helps.
Heat stress – Temperatures above 80°F can cause the plant to stop forming a head and instead send up a flower stalk (bolting). Once bolting starts, the head won't get bigger. Plant early in spring or late in summer to avoid heat.

Can I grow red cabbage in containers, and will that change the growth time?

Yes, you can grow red cabbage in pots, but the growth time may be slightly longer if the container limits root space. Use a pot that is at least 12 inches deep and 12 inches wide per plant.

Containers warm up faster, so soil may dry out quicker. You'll need to water more often. With proper care (regular feeding and watering), a container-grown red cabbage will mature in roughly the same 70–100 days as in-ground plants. Dwarf or smaller varieties like 'Red Acre' or 'Ruby Ball' are best for containers because their heads stay compact.

How does red cabbage compare to green cabbage in growth time?

Red cabbage and green cabbage have very similar growth times. Most green cabbage varieties also take 70 to 100 days from transplant to harvest. The main difference is color and slight differences in cold tolerance – red cabbage is often hardier in fall. If you're planning a garden, you can treat both the same way. The key is to choose a variety suited to your season and to provide steady moisture and nutrients.

To get the best head size and fastest maturity, always check the "days to maturity" on the seed packet or plant tag. That number is your best estimate for your specific variety.