PatternBaseBlack Horehound
Ballota nigra, Lamiaceae
Zones
4–9
Lifespan
Perennial
Growth
Moderate
Growing Conditions
Soil pH
6 – 8
Tolerances
Drought
Frost
Heat
Pest Resistance
Disease Resist.
Companion Plants
Antagonistic Plants
Wood SageSalvia × sylvestris
Both are aromatic Lamiaceae that compete for resources and may have cross-allelopathic effects
Turkish SagePhlomis russelianaBoth aromatic Lamiaceae produce competing chemical compounds and compete for similar resources
White CloverTrifolium repensBlack horehound may inhibit white clover growth through allelopathic compounds in dense temperate plantings
Common Questions
What zones does Black Horehound grow in?
Black Horehound grows in USDA hardiness zones 4 through 9.
What are good companion plants for Black Horehound?
Good companions for Black Horehound include Wood Betony, Bugleweed Herb.
Design guilds with Black Horehound and see companion relationships visually.
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