The tree-watering weather app
Trees want a deep, slow drink — not daily sips. Knowday combines two weeks of rain with a nearby soil-moisture model to estimate whether a deep soak may help. Check soil at the roots and use local tree guidance before watering.
Today · your trees
What we watch
Deep and infrequent, the way trees want it
Trees drink differently from grass — a long, deep soak every couple of weeks beats a daily splash. Knowday models roughly an inch of effective water over two weeks; a low estimate supports considering a soak after you check soil at the roots.
Has the rain already covered it?
The smartest watering is the watering you skip. Knowday combines recent and forecast rain to estimate when Wait may fit; confirm the soil at the roots before acting.
What the root-zone model estimates
Nearby modeled moisture can estimate low, moderate, or high — not measure your roots. A high estimate supports Wait; a low estimate supports considering a soak after you check soil at the roots.
When the drought is real
A long dry, windy stretch can raise modeled drying pressure. That estimate may increase watering urgency; check soil at the roots and use local tree guidance.
How it works
This is modeled guidance, not a root observation — Water, Wait, or Check first when the signal's thin. It combines two weeks of effective water, estimated root-zone moisture, and recent and forecast rain. Check soil at the roots and use local guidance before acting.
Two honest limits: this guidance is for established trees, which often want deep, infrequent water — newly planted trees need smaller, more frequent drinks — and it is modeled near you, not measured at your roots.
Who it's for
The maples out front, the orchard out back, the shade tree you don't want to lose. Knowday saves you from both mistakes — drowning the roots, or letting a dry spell go a week too long.
Tree watering is one of sixteen plans Knowday reads — walks and rides, the lawn, the garden, camping, the night sky, and the water.
See all plansNo catch
Free to use. No sign-up. Knowday sends an area-level location to Open-Meteo to fetch your forecast.