Buddleia
Water below
24%
Healthy band 30% to 75%
Needs wateringJust watered
Estimated Reasoned from rooting depth and drought tolerance. Worth checking against your own bed.
Grows out of walls and rubble unaided. Needs watering only in its first season.
Once established this plant rarely needs watering. Alerts are worth acting on mainly in a long dry spell or in its first year.
Grows out of walls and rubble unaided. Needs watering only in its first season.
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.