White horehound

Marrubium vulgare L.

Family: Lamiaceae

Pet & Human Safety

People: No hazard foundPets: Not on the ASPCA lists as we read them

Hazardous parts

Not yet checked.

Preparation

None stated. This record does not say any part is safe to eat.

Hazard type

Not yet checked.

Hazard route

The sources we use do not describe a hazard to people.

How complete this information is

The safety information on this page is partial. Where a source covers a point, it is shown; where none does, the page says so.

Toxic to pets

No ASPCA entry found.

No source gives a verdict. Any plant can upset a pet's stomach; call a vet or the ASPCA Poison Control line if a pet eats a lot of it.

PlotAndPetal cannot tell you whether a plant you found can be eaten. Only someone who can see the plant can identify it.

Poison control

If someone has collapsed, cannot be woken, is having a seizure or has trouble breathing, call 911 now. For any other possible poisoning, call Poison Help: 1-800-222-1222.

Emergency number source: U.S. federal law (47 U.S.C. § 251(e)(3)), read 2026-10-07.

Naturalist Lore

Historical Background & Breeding Lore

The history of this plant and its name, and how it was bred, where we have them.

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Care

Hardiness zones: USDA zones 3a to 9b (NC State Extension).
Water needs: low (sandy, dry, good-drainage soil preferred; tolerates moist or poor soil)
Mature size: 1 to 2 feet tall and 1 to 2 feet wide (NC State; reaches about 2 feet at maturity in 2 to 5 years)
Where it comes from: Europe, northern Africa, and southwestern and central Asia (NC State). Naturalized in much of Canada, North and South America.

Soil & Drainage

Pruning & Flush Rhythm

Feeding Schedule

How to prepare the soil, when and what to feed, and how and when to prune where that applies.

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