Rough Comfrey
Symphytum asperum

Family: Boraginaceae
Genus: Symphytum (sim-FY-tum) (Info)
Species: asperum (ASS-per-um) (Info)

Category:

Herbs

Perennials

Height:

4-6 ft. (1.2-1.8 m)

Spacing:

18-24 in. (45-60 cm)

24-36 in. (60-90 cm)

Hardiness:

USDA Zone 5b: to -26.1 C (-15 F)

Sun Exposure:

Light Shade

Partial to Full Shade

Danger:

Unknown - Tell us

Bloom Color:

Pink

Magenta (Pink-Purple)

Violet/Lavender

Purple

Bloom Time:

Late Spring/Early Summer

Mid Summer

Foliage:

Grown for foliage

Other details:

May be a noxious weed or invasive

Soil pH requirements:

Unknown - Tell us

Patent Information:

Unknown - Tell us

Propagation Methods:

By dividing the rootball

By dividing rhizomes, tubers, corms or bulbs (including offsets)

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; stratify if sowing indoors

Scarify seed before sowing

Seed Collecting:

Bag seedheads to capture ripening seed

Properly cleaned, seed can be successfully stored

Regional

This plant has been said to grow in the following regions:

Berea, Kentucky

Upper Darby, Pennsylvania

Gardeners' Notes:

No details have been posted.