Can You Plant Cedars in the Fall?
Yes, you can plant cedars in the fall, and for many gardeners, it is actually the best time of year to do it. Fall planting gives the roots several weeks of cool soil and regular rain to establish before the ground freezes, which leads to stronger growth the following spring.
Fall planting works well for most cedar varieties, including Emerald Green, Blue Atlas, Deodar, and Eastern Red Cedar, as long as you get them in the ground early enough. The key is timing, soil preparation, and a little extra care before winter hits.
What Makes Fall a Good Time to Plant Cedars?
Cooler air temperatures and warm soil create ideal conditions for root development. When you plant a cedar in September or October, the tree is not busy pushing out new leaves or fighting summer heat. Instead, it can focus energy on growing roots into the surrounding soil.
Warm soil is the hidden advantage of fall planting. In spring, the soil can stay cold and wet for weeks, which slows root growth and can lead to rot. Fall soil, on the other hand, holds warmth from the summer sun, so roots keep growing until the ground temperature drops below about 40°F.
Fall also brings more consistent rainfall in many regions, which means you will spend less time watering. Lower evaporation rates and milder sunlight reduce stress on the tree, giving it a gentler transition from pot to ground.
What Is the Best Time in Fall to Plant Cedars?
The ideal window is about six to eight weeks before the first hard frost in your area. For most zones 5 through 8, that means planting between mid-September and mid-October.
Check your local frost date and count backward. If your first frost typically arrives around October 15, aim to plant by September 1 at the latest. If you live in a warmer zone, you may have until early November.
Signs that it is too late to plant
- The ground has started to freeze at night
- Daytime highs stay below 50°F consistently
- Trees in your area are already fully dormant
Planting too late leaves the roots with no time to establish. The cedar will then sit in cold, wet soil all winter, which increases the risk of root rot and frost heave — a condition where freezing and thawing pushes the tree out of the ground.
How to Plant Cedars in Fall — Step by Step
Follow these steps to give your fall-planted cedars the best chance of survival.
Choose a healthy cedar. Look for a tree with vibrant green or blue-green foliage, firm branches, and no signs of yellowing, browning, or pests. A healthy start matters more than the planting date.
Dig a wide, shallow hole. The hole should be two to three times wider than the root ball but no deeper. Cedars hate having their roots buried too deep. The top of the root ball should sit slightly above ground level.
Loosen the roots. If the cedar is pot-bound with roots circling the inside, gently tease them apart with your fingers or a garden trowel. This encourages roots to spread outward instead of circling themselves.
Backfill with native soil. Do not add compost, fertilizer, or potting mix to the hole. Cedars do best when the soil around them matches the surrounding ground. Fill the hole halfway, water it, let it settle, then finish filling.
Water deeply right after planting. Give the tree a slow, deep soak so the water reaches the bottom of the root ball. A watering wand or a hose on low pressure works well for this.
Apply mulch, but keep it off the trunk. Spread a 2- to 3-inch layer of cedar mulch in a wide circle around the tree. Leave a 3-inch gap between the mulch and the trunk to prevent rot and pest damage.
What Problems Can Occur When Planting Cedars in Fall?
Fall planting has real risks, and knowing them ahead of time helps you avoid trouble.
Frost heave
When soil freezes and thaws repeatedly, it can push the root ball upward, exposing roots to cold air. This is more common in heavy clay soil or when the hole was dug too shallow. To prevent frost heave, mulch heavily after planting and water well before the ground freezes.
Drying winds
Evergreen cedars lose moisture through their needles all winter, even when the ground is frozen. If the roots cannot pull water from frozen soil, the tree can dry out. This is called winter burn, and it shows up as brown or rusty patches on the side facing the wind.
Root rot
Heavy fall rains combined with poor drainage can drown the roots. Cedars need well-drained soil. If your planting area holds water after a rain, consider building a raised bed or mounding the soil before planting.
Late planting failure
As mentioned, planting too close to frost is the most common mistake. The tree simply does not have time to settle in, and the roots die over winter.
How to Care for Fall-Planted Cedars Through Winter
Once the tree is in the ground, a few simple steps will carry it through the cold months.
Watering schedule
Water deeply once a week after planting until the ground freezes. If fall is dry in your region, do not skip this step. Dry roots going into winter are far more vulnerable than well-hydrated roots.
Mulch for insulation
Replenish the mulch layer if needed before the first hard freeze. Mulch acts as a blanket, keeping soil temperatures more stable and reducing frost heave. Use coarse organic mulch like bark chips or shredded hardwood.
Protect from wind and sun
For young cedars exposed to strong winter winds, consider wrapping them with burlap or installing a windbreak. This reduces moisture loss from the needles. You can also use a tree wrap to protect the trunk from sunscald, which happens when winter sun warms the bark and then it refreezes suddenly at night.
| Care Task | When to Do It | Why It Matters |
|---|---|---|
| Deep watering | Weekly until freeze | Prevents winter dehydration |
| Mulch refresh | Before first hard frost | Insulates roots, prevents heave |
| Wind protection | Late fall, before winds pick up | Reduces needle browning |
| Check for heave | Monthly during winter | Push root ball back down if lifted |
Do not fertilize
Fertilizing in fall encourages tender new growth that will not harden off before winter. Wait until early spring to apply a balanced fertilizer or compost.
Fall vs. Spring: Which Is Better for Planting Cedars?
Both seasons have advantages, but fall wins for root development. Spring planting works well too, especially in colder zones where winters are harsh and the ground stays frozen for months.
When fall is the better choice
- You live in zones 5 through 8 with moderate winters
- Your soil drains well and does not stay soggy
- You want the tree to be established before summer heat
- You can commit to weekly watering until freeze
When spring is the better choice
- You live in zone 4 or colder with long, deep freezes
- Your soil is heavy clay that stays wet all winter
- You missed the fall planting window
- You are planting a tender or less hardy cedar variety
In most cases, fall-planted cedars outperform spring-planted ones in their second year because they had months of root growth before the next summer. But a spring-planted cedar with careful watering can catch up by the following fall.
Common Mistakes to Avoid When Planting Cedars in Fall
Even experienced gardeners make these errors. Here is what to watch for.
Planting too deep. This is the number one killer of newly planted cedars. The root ball should sit slightly above ground level, not below it. Planting too deep traps moisture against the trunk and causes rot.
Skipping the watering step after planting. Some people assume fall rain will take care of it, but a dry spell after planting can kill the tree before winter even starts. Always water in the tree immediately.
Using fertilizer or compost in the hole. Cedars do not need rich soil to start. Adding organic material to the hole creates a "pot effect" where roots stay inside the soft soil instead of spreading into the surrounding ground. This leads to a weak, unstable tree later.
Not mulching wide enough. A small ring of mulch around the trunk does almost nothing. Spread mulch in a 3-foot diameter circle for small trees and wider for larger ones. The goal is to insulate the entire root zone.
Ignoring the forecast. If a hard freeze is coming in three days, wait until spring. Even a healthy cedar needs time to settle in before temperatures drop below freezing for good.
Making Fall Planting Work for Your Cedars
Fall planting is a smart strategy for cedars when you get the timing and care right. The cooler weather, warm soil, and natural rainfall give the tree a running start that spring planting simply cannot match.
Stick to the six-to-eight-week window before your first frost. Dig a wide, shallow hole and keep the root ball at or just above ground level. Water deeply and regularly until the ground freezes. Mulch generously but keep it off the trunk. Protect the tree from winter wind and sun if needed.
Avoid the common pitfalls — planting too deep, planting too late, and fertilizing in fall. If you follow these guidelines, your cedars will settle in quietly over winter and burst into strong growth when spring arrives. Fall-planted cedars that survive the first winter are usually healthier, more drought-tolerant, and better anchored than their spring-planted counterparts by the following year.
Whether you are planting a privacy hedge of Emerald Green cedars, a single specimen Blue Atlas cedar, or a windbreak of native Eastern Red cedars, fall gives you a real advantage. The key is acting early enough, watering well, and giving the roots time to do their work before the ground freezes solid.