Can You Plant Arborvitae In Summer? | Summer Planting Tips

Arborvitae are the workhorses of backyards across the country. They screen out neighbors, block wind, and grow fast enough to satisfy impatient gardeners. That reputation for toughness makes people wonder whether planting them in summer — the most convenient time for many homeowners — is really that risky.

The short answer is yes, you can plant arborvitae in summer, but the margin for error shrinks considerably once temperatures climb. The key difference between a summer planting and a spring one is the watering commitment you are signing up for. This article covers what changes when you plant in heat and how to tilt the odds in your favor.

The Real Challenge Of Summer Planting

Transplant shock happens to almost any tree moved during the growing season. Purdue University’s landscape report flags high transpiration — the process where plants lose water through their leaves — as the main culprit. When you transplant an arborvitae in summer, the root system gets disturbed right when the hot, dry air is pulling moisture out of the foliage the fastest.

The result is a tree that cannot drink enough water to keep up with what it is losing. Needles start to brown, usually from the inside out or from the tips inward. That browning is the plant’s way of sacrificing foliage to keep the core alive.

Understanding this mechanism explains why every piece of advice about summer planting comes back to one thing: getting enough water to the roots to match the transpiration rate.

What Arborvitae Need To Survive A Summer Transplant

Most homeowners plant arborvitae because they want privacy now. Waiting until spring feels like losing a whole growing season. That is understandable. To make a summer planting work, you have to get a few non-negotiable conditions right from the start.

• Full sun (mostly): Arborvitae need at least 3 to 4 hours of direct sun daily. A spot that bakes in harsh afternoon sun can push a stressed transplant over the edge. Morning sun with afternoon shade is ideal for summer installs.
• Well-drained soil: Standing water is a death sentence for arborvitae roots. Nurseries suggest soil should drain at roughly 1 inch per hour. Sandy soil drains faster and may require more frequent watering, while clay holds moisture longer but can suffocate roots if overwatered.
• Deep, consistent watering: For the first two weeks, water deeply every 2 to 3 days. That means a slow soak reaching 6 to 8 inches down, not a quick sprinkle. After that, stretch to every 4 to 5 days for the rest of the first growing season.
• Variety strength: Some arborvitae handle summer heat better than others. Green Giant Arborvitae are known for resilience in hot conditions, while Emerald Green can manage with careful attention. Both are better summer candidates than delicate dwarf varieties.

Getting these conditions right before you dig the hole makes the difference between a tree that sulks for months and one that settles in and starts growing despite the calendar.

Best Practices For Planting In Warm Weather

Nurseries like Patuxentnursery confirm that varieties such as Emerald Green and Green Giant can handle summer planting, though technique matters as much as timing. The soil preparation and aftercare schedule detailed in their planting arborvitae in summer guide starts with digging a hole twice as wide as the root ball but no deeper.

Shallow planting is a common mistake. The root ball should sit slightly above ground level — about an inch or two — to prevent water from pooling around the trunk. Backfill with the original soil rather than rich amendments, which can discourage roots from spreading outward.

That schedule assumes you are paying attention to rainfall. If it rains an inch in a week, skip a watering cycle. If the temperature stays above 90°F for days, check the soil moisture more often.

Step-By-Step Guide To A Successful Summer Planting

The order of operations matters when you are planting in heat. A quick, organized process reduces the time the roots spend exposed to air. Here is the sequence that experienced gardeners follow for summer arborvitae installs.

1. Prep the hole and water the pot: Dig the hole twice as wide as the container. Before you pull the tree out, water it thoroughly in the pot. A well-hydrated root ball is less likely to crumble apart during transplant.
2. Loosen the roots gently: Arborvitae sometimes get root-bound in nursery pots. Tease the outer roots apart with your fingers or a small hand rake. If they circle tightly, make a few vertical slices with a knife to encourage outward growth.
3. Set the tree and backfill: Place the root ball so the top sits 1 to 2 inches above the surrounding soil. Backfill with the native soil, tamping it down gently to remove air pockets without compacting it.
4. Water deeply and mulch: Immediately after planting, water slowly and deeply. Apply 3 to 4 inches of organic mulch in a ring around the base, keeping it a few inches away from the trunk. Mulch keeps the soil cool and slows evaporation.
5. Provide temporary shade: If the spot faces intense afternoon sun, rig a temporary shade cloth or burlap screen for the first week or two. This reduces the transpiration load while the roots establish.

Each of these steps reduces the overall stress on the plant. Skipping even one — especially the watering or mulching — can turn a manageable transplant into a losing battle during hot weather.

Recognizing And Managing Transplant Stress

Per transplant shock and transpiration research from Purdue, the first sign of trouble is often subtle bronzing or yellowing of the inner needles. This is the plant shifting resources to stay alive. If the stress continues, the browning spreads outward. Catching it early lets you intervene before the tree loses significant foliage.

The most common response to browning is to water more, which is usually the right instinct, but check the soil first. If the ground is already soggy, root rot could be the problem rather than drought. In that case, letting the soil dry out for a few days may help.

Some browning is cosmetic and will not kill the tree. Arborvitae can drop interior needles as part of normal adjustment. As long as the branch tips stay green and flexible, the plant is likely to recover by the following growing season. Patience through the first summer is a big part of success.

The Bottom Line

Planting arborvitae in summer is not the ideal window, but it is far from impossible. The biggest risk is transplant shock from high transpiration, which you manage with deep watering, heavy mulching, and careful timing. If you have the choice, spring or fall is less work. If summer is your only window, choose heat-tolerant varieties like Green Giant and watch the weather before you dig.

Your local county extension office or a trusted independent nursery can tell you exactly how your soil type and microclimate affect summer transplant success — their advice is tailored to your specific growing zone.