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Legend
- Start Indoors
- Transplant
- Start Outdoors
- Care
- Harvest
- Succession Plant
Fast growing perennial root with that classic horseradish burn
Horseradish is a fast-growing perennial in USDA zones 3–9. After the first frost in the autumn kills the leaves, the root is dug and divided. The main root is harvested and one or more large offshoots of the main root are replanted to produce next year’s crop. Horseradish left undisturbed in the garden spreads via underground shoots and can become invasive.
Brassicaceae Armoracia rusticana
This is an example of the timeline you would see based on your growing conditions.
Root Rot
Root Rot is caused by a variety of fungi and can attack many different plant species (including trees and shrubs). The first clue to a problem is that plants aren’t very vigorous. As this progresses plants show typical signs of root damage, leaves turn yellow and wilt easily and growth is slow. Small plants and seedlings succumb quickly, larger plants (even shrubs and trees) eventually die too. Check for root rot by looking at the roots. If they are rotten it is probably Root Rot (no surprise there). The fungi that cause Root Rot are found in all soils. Make sure the soil is well drained and has warmed up enough for your crop.
Image: R.J. Reynolds Tobacco Company Slide Set, R.J. Reynolds Tobacco Company, Bugwood.org
Last Frost Date (LFD) refers to the approximate date of the last killing frost of spring.
Example first frost date on April 08.
First Frost Date (FFD) refers to the approximate date of the first killing frost of winter.
Example first frost date on November 01.
