Lettuce
Water below
64%
Healthy band 70% to 92%
Needs wateringJust watered
Researched Converted from published irrigation figures for this crop.
Shallow rooted and quick to bolt in dry heat. Little and often, ideally in the morning.
Shallow rooted and quick to bolt in dry heat. Little and often, ideally in the morning.
Setting the threshold
These figures are a tested starting point on a calibrated monitor. Watch one full wet to dry cycle in your own bed and adjust if the plant tells you otherwise. Soil type, container size and how much sun the spot gets all shift where the right number sits.