Photo by Melody

PlantFiles: Purple Giant Hyssop, Lavender Hyssop
Agastache scrophulariifolia

Family: Lamiaceae (lay-mee-AY-see-ee) (Info)
Genus: Agastache (ah-gas-TAH-kee) (Info)
Species: scrophulariifolia (skrof-yoo-lar-ee-eye-FOH-lee-uh) (Info)

Synonym:Agastache scrophulariaefolia

4 vendors have this plant for sale.

15 members have or want this plant for trade.

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24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)

Unknown - Tell us

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)

Sun Exposure:
Sun to Partial Shade
Light Shade

Unknown - Tell us

Bloom Color:

Bloom Time:
Late Summer/Early Fall


Other details:
This plant is attractive to bees, butterflies and/or birds
Flowers are fragrant
Requires consistently moist soil; do not let dry out between waterings
This plant may be considered a protected species; check before digging or gathering seeds

Soil pH requirements:
Unknown - Tell us

Patent Information:

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

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored

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2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive Mitchella On Aug 13, 2014, Mitchella from Pownal, ME (Zone 5b) wrote:

A wonderful native (to the eastern US) plant for the back of the border (mine are 6 feet or more) or damp meadow. The sturdy stems (no staking required) bear upright stalks of pink (mine are not purple but they vary) flowers that attract many pollinators, including butterflies. The seed heads in winter attract gold finches, purple finches and other birds. They do self-sow, but not aggressively; and the clump does slowly increase, but not like other plants in the mint family. Easy from seed (requires 8 weeks in cold stratification), division, or cuttings. Supposed to prefer damp soil but I never water mine; also prefers sandy soil but mine is clay with a little compost. No significant pests and deer resistant. Highly recommended.

Positive angihansen On Mar 26, 2006, angihansen from Watkinsville, GA wrote:

This native plant is currently listed as endangered in Connecticut.


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

Riverside, California
Downers Grove, Illinois
Barbourville, Kentucky
Pownal, Maine
Clinton, New Jersey
Frenchtown, New Jersey
Voorhees, New Jersey
Kernersville, North Carolina
Pittsburgh, Pennsylvania
Rumford, Rhode Island
Conway, South Carolina
North Augusta, South Carolina
Signal Mountain, Tennessee
Soddy Daisy, Tennessee
Leesburg, Virginia

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