Sunflower
Water below
49%
Healthy band 55% to 85%
Needs wateringJust watered
Researched Converted from published irrigation figures for this crop.
Deep roots find their own water once established, though tall varieties drink heavily in a heatwave.
Deep roots find their own water once established, though tall varieties drink heavily in a heatwave.
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.