Water & soil · 8 minute guide
How to water newly planted trees and shrubs
A practical establishment schedule for Sydney gardens, including the finger test, deep watering and when to ease off.
New plants fail more often from irregular watering than from a lack of fertiliser. The goal is to wet the full root ball and surrounding soil, then allow oxygen to return before the next soak.
Before you begin
What you’ll need
- Hose with shower nozzle or drip line
- Trowel
- 9–10 litre watering can
- Mulch
Check below the surface
Push a finger or trowel 5–8 cm into the soil beside the root ball. Water when it feels only slightly damp or dry—not simply because the mulch surface looks dry.
Build a shallow watering basin
Form a low ring of soil just beyond the root ball. This slows runoff and directs water through the new roots rather than across the surface.
Water slowly and deeply
Apply water at a rate the soil can absorb. As a starting point, use roughly 10 L for a small shrub, 20 L for a 25–45 L plant and 40 L or more for an advanced tree.
Field noteSplit the volume into two passes on compacted or sloping ground.
Confirm penetration
Wait ten minutes, then check the soil at root-ball depth. If the centre remains dry, reposition the emitter or gently break up water-repellent soil.
Adjust for weather and soil
Check daily during the first two weeks, two to three times weekly through the first three months, then taper as roots establish. Sand dries faster; clay needs longer gaps.
Keep the trunk dry
Maintain 50–100 mm of clear space around stems and trunks. Constant moisture against bark encourages rot and pests.
Important
Common mistakes to avoid
- Do not follow a calendar blindly—rain, wind, container size and soil change demand.
- Wilting can also indicate waterlogging. Always test the soil first.
This guide provides general horticultural information for Sydney conditions. Site drainage, soil, weather and individual species requirements vary. For tree safety, chemical use or persistent plant decline, use an appropriately qualified professional.
Available from our nursery
Continue from advice to supply.
Stock changes regularly. Open a plant to see current sizes and add it to a project schedule.Read next / Water & soil