Horse-radish
Armoracia rusticana
Last reviewed: August 2026
Toxicity unknown
Horse-radish (Armoracia rusticana) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
part shade
Water
medium
Size
24"–48" H × 12"–24" W
Bloom
May, Jun, Jul
Pollinators
bees, beetles
Native alternatives to Horse-radish
Horse-radish is not native to the United States. These natives fill a similar role in a planting, matched on bloom season, bloom color and mature size.
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 452 programs across 44 states, each with a link to the provider and the date we last checked it.
Find rebates in your areaHorseradish is a robust perennial herb with large, coarse leaves that grows 2-4 feet tall. It produces small white flowers in late spring and early summer, though it's primarily grown for its pungent edible roots. The plant spreads moderately and can become established in garden beds.
In an HOA neighborhood
Horse-radish takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Large coarse leaves can appear untidy
- Tends to spread aggressively
- More appropriate as herb garden plant than ornamental
Wildlife value
The white flower clusters attract bees and beneficial beetles during the blooming period from May through July.
Common questions
- How much sun does Horse-radish need?
- Horse-radish grows best in part shade conditions.
- When does Horse-radish bloom?
- Horse-radish blooms in May, June, and July.
- What pollinators does Horse-radish attract?
- Horse-radish draws bees and beetles.
- Is Horse-radish HOA-friendly?
- Horse-radish takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
Ready to grow Horse-radish? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Planning a bed around it? Start a free plan with this plant
Not sure where to start? Take the 2-minute yard quiz