GallonTree guides

Harvested rainwater is preferred for young trees when available; fill bags with cans or buckets from the butt.

Mulch reduces evaporation and bags dose water; use both with a clear collar at the trunk.

Many UK public guides use about 50 litres per week in summer for young trees; a 20 US gallon bag is a dosing tool, not a daily mandatory fill.

Take bags off outside the dry-season watering window; do not leave them on through wet winters.

Bags zip on after planting; tubes or pipes are usually installed with the rootball.

Watering cans, buckets and many non-hose fills may remain available, but hosepipe exemptions vary by water company.