Comfrey typically starts flowering in April or May.
comfrey
Symphytum uplandicum
Cycle:
Herbaceous Perennial
Watering:
Average
Propagation:
Division,Root Cutting,Seed Propagation,Layering Propagation
Hardiness Zone:
4 - 8
Flowers:
Rose aging to purple Flowers
Sun:
Full sun,part shade
Leaf:
Yes
Leaf Color:
green
Growth Rate:
Low
Maintenance:
Moderate
Poisonous To Humans:
Yes
Poisonous To Pets:
Yes
Drought Tolerant:
Yes
watering
Comfrey (Symphytum uplandicum) prefers moist soil so it should be watered frequently. During the growing season, the plant should be watered deeply once a week or twice a week if it receives limited rainfall. When the soil is dry and you can comfortably stick your finger 1 inch deep into the soil to check, then it is time to water. During the winter months, water the plant only when the soil is dry.
sunlight
Comfrey (Symphytum uplandicum) prefers full sun exposure for at least 6 hours per day to be most productive and healthy. This means that the plant should be placed in an area that gets direct sunlight for most of the day. If that is not available, filtered light or partial shade can also work. Ideally, comfrey should be planted in an area where it will get plenty of sun in the morning and some protection from mid-day and afternoon sun. When the temperatures are hot, partial shade can be provided by nearby trees or other tall plants.
pruning
Comfrey (Symphytum uplandicum) should be pruned once a year, ideally in the late winter or early spring. Pruning should be done to maintain the desired size or shape of the plant. To encourage branching and bushy growth, cut back the main stems 4-6 inches (10-15 cm) from their tips. Cut off any dead or damaged branches and remove weak or thin stems. Pruning also helps to encourage the production of flowers and can be done after flowering is complete.