White Horehound
Marrubium candidissimum
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
18 inches
Width
18 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8, 9
Water
Low to moderate
Humidity
Average
Lifespan
Perennial
Native To
Mediterranean region
Toxicity
Non-toxic to humans and pets
The Story
Plant Bio
Marrubium candidissimum, commonly known as White Horehound, is a hardy perennial with woody stems, silvery-white, wrinkled leaves, and spikes of small, white, tubular flowers that attract pollinators. This species is particularly valued for its aromatic foliage and medicinal properties, as well as its ability to thrive in well-drained, poor soils with minimal maintenance.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
We couldn't find this plant listed online right now.
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Tuck seeds into well-draining soil in spring.
- Water lightly until seedlings establish, about 2 weeks.
- Place in full sun for optimal growth.
- Thin seedlings to 12 inches apart after emergence.
- Mulch lightly to retain moisture and suppress weeds.
- Fertilize with a balanced organic fertilizer in early spring.
Pro Tip
Ensure excellent drainage to prevent root rot.
Keep It Thriving
Care Guide
Do
- Water sparingly once established 💧
- Prune lightly after flowering to maintain shape
- Apply organic mulch annually 🌱
- Use organic pest control if needed
Don't
- Overwater or allow to sit in soggy soil ❌
- Use chemical pesticides indiscriminately
- Neglect pruning, which can lead to legginess
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Harvest | ||||||||||||
| Plant | ||||||||||||
| Propagate | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
White Horehound questions
What zones can White Horehound grow in?
White Horehound is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is White Horehound deer resistant?
Yes — White Horehound is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does White Horehound bloom?
White Horehound typically blooms in early summer through mid-summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does White Horehound need full sun?
White Horehound does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is White Horehound drought tolerant?
Yes — once established (usually after the first full season), White Horehound handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Marrubium to compare
Keep exploring
Explore the genus
Collections featuring this plant
Grow White Horehound with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
