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Rough Comfrey

Symphytumasperum

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Genus

Symphytum (sim-FY-tum)

Info

Species

asperum (ASS-per-um)

Info

Synonym

Sun Exposure

Light Shade

Partial to Full Shade

Foliage

Grown for foliage

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)

Danger

Unknown - Tell us

Bloom Color

Pink

Magenta (pink-purple)

Lavender

Medium Purple

Bloom Time

Late Spring/Early Summer

Mid Summer

Other Details

Category

Herbs

Perennials

Water Requirements

Unknown - Tell us

Foliage Color

Unknown - Tell us

Where to Grow

Unknown - Tell us

Bloom Characteristics

Unknown - Tell us

Bloom Size

Unknown - Tell us

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 is said to grow outdoors in the following regions:

Berea, Kentucky

Upper Darby, Pennsylvania

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2 members have or want this plant for trade

Gardener's Notes:

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