Bocking 14 Russian Comfrey
The Bocking 14 Russian Comfrey is a sterile hybrid that will not set seed but can still spread if its roots are disturbed. Comfrey has long been a favorite of ecological minded gardeners and farmers for building soil and bringing nutrients to the surface as a “chop and drop” mulch.
Though it has suffered from some bad press throughout the years, comfrey’s medicinal use, as well as its use as a “dynamic accumulator” companion plant, fertilizer and herbal insecticide, far outweigh its reputation as an “invasive spreader.”
The key to keeping comfrey in its place is as simple as putting up a “Do not disturb” sign. When the roots of the plant are disturbed (through tilling or hoeing) it triggers a self-preservation response from the plant, causing the root system to send up many new shoots to ensure its survival.
The Bocking 14 cultivar is a sterile variety and will not produce seeds.
Botanical Name: Symphytum x uplandicum ‘Bocking 14’
Site and Soil: Full sun; well-draining soil
Plant Spacing: 3 ft.
Pollination Requirements: Sterile; will not produce seeds
Hardines: Minus 40° F
Size at Maturity: 4 ft. tall
Bloom Time: April-September
Ripening Time: n/a
Pests & Diseases: None
USDA Zone: 3-9
Sunset Western Zone: All zones
Sunset Northeast Zone: All zones