Sow in cool seasons
Spring or late summer, 1/4–1" deep.
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A seed worth growing
A deep-rooted radish to break up compaction.
As a cover crop, oilseed radish drives an extra-long taproot that loosens and aerates the soil and pulls up nutrients for the next crop. Turned under just before flowering, it helps control some soil pests, notably cyst and sting nematodes.
Keep it out of tight rotations with cabbage-family crops, since they share pests and diseases. Hardy to about 20°F. Sow in fall.
About 60–90 days to flowering. Open-pollinated.
In stock — 1 Pound
Know before you sow
Growing times vary with weather, soil and local conditions.
Spring or late summer, 1/4–1" deep.
Shared pests and diseases.
Mustard 1/4 lb. per 1,000 sq. ft.
Work in or tarp right away for biofumigation.
Cover-crop brassicas such as mustard, oilseed radish and forage turnip grow fast in cool weather, make plenty of biomass, hold soil, break up compaction and suppress weeds. They contain compounds that can help suppress some soil diseases and pests, and they scavenge nutrients well, though winter-killed plants may release nitrogen before the next crop can use it; sow them in an overwintering mix to hold it longer. Some types can be grazed.
Do not plant them ahead of cabbage-family vegetables, since they share pests and diseases.
Sow 1/4–1" deep depending on seed size. Drill, or broadcast and cover lightly. Spring and late-summer sowings do best; radish and turnip are best sown in late summer or fall so they root well instead of bolting.
Use the high end when broadcasting. Mustard: 1/4 lb. per 1,000 sq. ft. (5–15 lb. per acre). Oilseed radish: 1/2 lb. per 1,000 sq. ft. (10–20 lb. per acre). Turnip: 1/4 lb. per 1,000 sq. ft. (5–8 lb. per acre).
Most do well at pH 5.5–8.5 in fertile, free-draining soil. Seed germinates in soil from about 45 to 85°F (7–29°C).
Mow or till at flowering. For the biofumigant effect, mow at bloom and work it in or tarp it right away. They winter-kill reliably in Zone 6 and colder.
About 31,350 on average.
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