Delphinium
Water below
54%
Healthy band 60% to 85%
Needs wateringJust watered
Estimated Reasoned from rooting depth and drought tolerance. Worth checking against your own bed.
Needs steady moisture to push up tall spikes. Mulch in spring and stake early.
Needs steady moisture to push up tall spikes. Mulch in spring and stake early.
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.