How to Water white comfrey?
Moderate regular watering, avoid prolonged drought or waterlogging

white comfrey · Symphytum orientale
Grow in sun or partial shade in moist, moderately fertile soil. Whilst it may have the potential to become a nuisance, the risk is less compared to some other Symphytum species, but it self-seeds readily
Moderate regular watering, avoid prolonged drought or waterlogging