plant

Horseradish

Armoracia rusticana

Updated 4 Aug 2026 · AI-parsed entry

Horseradish (Armoracia rusticana) — a plant, for Full sun, Medium water. Companions: Cabbage, Potato.

What it needs & gives back

↓ Needs

Lightfull sun to partial shade
Watermedium to high

↑ Gives back

Mulch_biomassmedium

Companions

Through the year

Through the year

JFMAMJJASOND
emergenceEmergence of new shoots in spring after the last frost and when soil temperatures consistently reach 5°C.
floweringFlowering typically occurs about two months after emergence, producing small white flowers.
harvestRoots are best harvested in late autumn after the first frost, which improves flavor, and can continue into early winter.
dormancyPlants enter dormancy with the onset of consistent freezing temperatures in autumn.

Soil interactions

Drainagewell-drained
Nitrogen fixingNo
MycorrhizalNo
Accumulatespotassium, sulfur
Soil textureloam, sandy_loam
Organic matterMedium
Compaction toleranceMedium

Propagation

Methodsroot_cuttings, division
Difficulty1 / 5
Establishes in~1 yr
Divisionspring

Wildlife & pests

RepelsColorado potato beetle, cabbage worms
Can host pestsflea beetle, cabbage worm
Can host diseaseswhite rust, leaf spot