Newly planted trees need roughly 10-15 gallons of water, 2-3 times per week, for the first 2-3 months after planting, then tapering to a weekly deep soak through the remainder of the first growing season. Newly planted shrubs need less volume but the same frequency — roughly 3-5 gallons per plant, 2-3 times weekly at first. Underwatering during this establishment period is the single most common cause of new plant failure in Georgia landscapes, more so than disease, pests, or planting technique combined.
The root ball of a container-grown or balled-and-burlapped plant is disconnected from the surrounding native soil for the first several months after planting, meaning rainfall alone often isn't enough to reach and saturate it even when the surrounding yard looks adequately moist.
Watering Schedule by Establishment Stage
| Time Since Planting | Trees | Shrubs |
|---|---|---|
| Weeks 1-2 | 15-20 gal, every 2-3 days | 5 gal, every 2-3 days |
| Weeks 3-8 | 10-15 gal, 2x weekly | 3-5 gal, 2x weekly |
| Months 3-6 | 10-15 gal, weekly | 3-5 gal, weekly |
| Months 6-12 | Deep soak weekly during dry spells | Deep soak weekly during dry spells |
| Year 2+ (established) | Rainfall usually sufficient except drought | Rainfall usually sufficient except drought |
How Do I Know If I'm Watering Enough?
Check soil moisture 3-4 inches down near the root ball, not just at the surface — the top inch of soil can look and feel dry within hours even when the root zone below is adequately moist, and conversely can look damp on top while the root ball itself stays dry. The most reliable method is a finger or small trowel test at root-ball depth before and after a scheduled watering, adjusting frequency based on what you find rather than a fixed calendar.
Signs of Underwatering
- Wilting that doesn't recover by evening or after watering
- Leaf edges browning or curling, especially on newer growth
- Soil pulling away from the edge of the root ball or planting hole
Signs of Overwatering
- Yellowing leaves throughout the plant, not just older growth
- Soggy, foul-smelling soil or standing water in the planting hole
- Wilting despite consistently wet soil (a sign of root rot, not thirst)
Does Georgia's Rainfall Cover Watering Needs?
Rarely, at least not for the first few months — even during a rainy Georgia spring, a typical rain event doesn't always penetrate deeply enough to reach and saturate a new root ball, especially one surrounded by denser native clay that sheds water around, rather than into, the amended planting hole. Supplemental watering is still necessary during the establishment period even in a wet season; it becomes optional only once the plant is well-rooted into the surrounding soil, typically after the first full year.
Does Watering Method Matter?
Slow, deep watering that saturates the full root zone is far more effective than frequent shallow watering, which encourages roots to stay near the surface where they're more vulnerable to heat and drought stress. A slow-trickle hose, soaker hose, or 5-gallon bucket with a few small holes drilled in the bottom, left to drain near the base of the plant, are all effective low-tech methods for delivering a deep soak.
How Does Mulch Affect Watering Needs?
A 2-3 inch layer of mulch reduces water loss from the soil surface significantly, often stretching the interval between necessary waterings, but mulch piled directly against the trunk or stems traps moisture against the bark and encourages rot — always keep mulch a few inches back from the trunk in a "donut," not a "volcano," shape.
Does Plant Type Change the Watering Amount?
- Evergreens (arborvitae, holly, cedar): Need water through winter too, since they continue losing moisture through foliage year-round
- Deciduous trees/shrubs: Watering needs drop significantly once leaves fall, resuming as new growth begins in spring
- Drought-tolerant natives: Still need full establishment watering for the first year despite their eventual low-water reputation
When Can I Stop Watering a New Planting?
Most trees and shrubs are considered established, and can rely primarily on rainfall except during drought, after one full growing season for shrubs and two full growing seasons for trees, since trees take longer to develop a root system proportional to their above-ground size. Extended drought conditions still warrant supplemental deep watering even for established plantings.
Are Drip Irrigation Systems Worth It for New Plantings?
A simple drip irrigation system or soaker hose on a timer takes the guesswork out of establishment watering and is especially worth the investment for larger projects with 10 or more new plants, where hand-watering consistently becomes impractical. Even a basic setup that delivers a scheduled deep soak 2-3 times a week removes the most common point of failure in new plantings: an inconsistent watering routine during the critical first months.
A Simple Way to Track Watering
Keep a basic log — even a note on your phone — of when each new planting was last watered, since it's easy to lose track across multiple trees and shrubs planted at different times with different needs. Pairing that log with a quick soil-moisture check before each scheduled watering prevents both under- and over-watering during establishment.
Getting watering right in the first year makes the biggest difference in whether a new planting thrives. BB Blossoms includes an establishment watering guide with every installation across Gwinnett County.