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Comfrey

Symphytumx rubrum

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Genus

Symphytum (sim-FY-tum)

Info

Species

x rubrum (ROO-brum)

Info

Synonym

Sun Exposure

Sun to Partial Shade

Foliage

Herbaceous

Height

12-18 in. (30-45 cm)

Spacing

15-18 in. (38-45 cm)

Hardiness

USDA Zone 3a: to -39.9 °C (-40 °F)

USDA Zone 3b: to -37.2 °C (-35 °F)

USDA Zone 4a: to -34.4 °C (-30 °F)

USDA Zone 4b: to -31.6 °C (-25 °F)

USDA Zone 5a: to -28.8 °C (-20 °F)

USDA Zone 5b: to -26.1 °C (-15 °F)

USDA Zone 6a: to -23.3 °C (-10 °F)

USDA Zone 6b: to -20.5 °C (-5 °F)

USDA Zone 7a: to -17.7 °C (0 °F)

USDA Zone 7b: to -14.9 °C (5 °F)

USDA Zone 8a: to -12.2 °C (10 °F)

USDA Zone 8b: to -9.4 °C (15 °F)

Danger

Unknown - Tell us

Bloom Color

Scarlet (dark red)

Bloom Time

Late Spring/Early Summer

Other Details

Gardener's Notes:

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positive

neutral

negative

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