The tree-watering weather app
Trees want a deep, slow drink — not daily sips. Knowday looks back across the last two weeks of rain and the soil near you, then tells you whether it's time to soak or time to wait.
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 tracks roughly an inch of water over two weeks and tells you to soak when the trees have fallen behind.
Has the rain already covered it?
The smartest watering is the watering you skip. Knowday adds up the rain that's actually fallen — and the rain that's coming — and says Wait when the sky's doing the job for you.
How dry the root zone is
It reads the soil moisture near you, down where the roots live. Holding plenty and you get a plain Wait; dried out through the root zone and it's time to soak.
When the drought is real
A long dry, windy stretch pulls water out of the ground fast. Knowday watches the drought build and moves to Water sooner, before a thirsty tree starts to show it.
How it works
This is an action, not a readout — Water, Wait, or Check first when the signal's thin. It scores the last two weeks of effective water, how dry the root zone is, and whether rain just fell or is on the way, then leans toward holding off when nature's already delivered the soak.
Two honest limits: this reads established trees, which want deep, infrequent water — newly planted trees need smaller, more frequent drinks — and it's all 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. Your location is only used to fetch your forecast.