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PlantFiles: Horehound
Marrubium cylleneum

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Family: Lamiaceae (lay-mee-AY-see-ee) (Info)
Genus: Marrubium (ma-ROO-bee-um) (Info)
Species: cylleneum (sy-LEN-ee-um) (Info)

Synonym:Marrubium cyllenium

One vendor has this plant for sale.

5 members have or want this plant for trade.

Category:
Herbs

Height:
24-36 in. (60-90 cm)

Spacing:
15-18 in. (38-45 cm)

Hardiness:
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)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Full Sun

Danger:
N/A

Bloom Color:
White/Near White

Bloom Time:
Mid Summer

Foliage:
Grown for foliage
Herbaceous

Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)

Patent Information:
Non-patented

Propagation Methods:
By dividing the rootball
From herbaceous stem cuttings
Allow cut surface to callous over before planting
From seed; direct sow outdoors in fall
From seed; direct sow after last frost
By simple layering
By serpentine layering

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

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Regional...

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

Fort Payne, Alabama
Amesti, California
East Richmond Heights, California
Fairfield, California
Menifee, California
Mountain Ranch, California
Richmond, California
Sun City, California
Linthicum Heights, Maryland
Nahant, Massachusetts
Howell, Michigan
Binghamton, New York
Flat Rock, North Carolina
Portland, Oregon
Lampasas, Texas



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