Seed to Termination Cover Crop Guide
How to grow turnips as a cover crop
Grow forage turnips for quick cool-season cover, protein-rich leaves, nutrient scavenging, and bulb-and-root soil conditioning—then graze carefully or terminate before seed.
Forage above, soil work below
Turnips combine a leafy grazing canopy with an edible soil-conditioning bulb.
Forage turnips are cool-season brassicas grown as annual covers. Leaves capture sunlight and nitrogen quickly, while the bulb and roots loosen surface soil and add rapidly decomposing residue.
Cover crop turnips at a glance
The path from tiny seed to grazed or winter-killed cover
Select any milestone to jump directly to its full instructions.
When and how to plant
Give the stand enough cool weather to build leaves and bulbs
Turnips can be spring planted for summer forage or late-summer planted for fall and early-winter use.
Choose the window and rotation
Plant after soil reaches about 45–50°F in spring, or roughly 70 days before a killing frost for fall production.
- Avoid saturated or erosion-prone monocrop sites.
- Rotate away from cabbage-family cash crops.
- Use full sun and dependable establishment moisture.
Calibrate the small seed
Use about 3–5 lb/acre drilled—roughly 1.1–1.8 oz per 1,000 square feet. NRCS guidance may use 4 lb broadcast; regional recommendations can be higher.
Seed shallowly and firm
Place seed ¼–½ inch deep; Barkant's verified listing specifies ½ inch. Drill where possible or lightly incorporate and roll broadcast seed.
- Do not bury the tiny seed deeply.
- Keep the surface moist through 3–10 day germination.
- Check calibration often at low rates.
Cover-crop benefits
What a healthy turnip stand contributes
Barkant emphasizes abundant leafy forage while the bulb and root provide added soil and nutrient benefits.
Produces quality forage
A high leaf-to-stem ratio supplies protein-rich, high-energy grazing in the cool season.
Scavenges nitrogen
Rapid growth captures soluble nutrients and returns them as quickly decomposing residue.
Conditions surface soil
Bulbs and roots loosen soil, improve infiltration pathways, and feed soil organisms as they decay.
Competes with weeds
A vigorous rosette shades bare ground and limits fall weed establishment.
Stand checkpoints
Track emergence, canopy, grazing readiness, and survival.
Evaluate both leaves and bulbs; grazing too early sacrifices yield, while grazing too low removes the growing point.
Seedlings emerge
Check moisture, crusting, depth, bare strips, and flea-beetle injury.
Rosettes close canopy
Confirm even cover and reduce competition only where the system permits.
Forage reaches full use
Begin controlled grazing near 12 inches; strip graze and maintain access to dry fiber.
Winterkill becomes clear
Inspect the bulb crown for firm green tissue and control surviving plants.
Text-only diagnostics
Diagnose turnip problems early
Match the symptom, then open the card for the likely cause and next practical action.
EstablishmentThin or patchy seedlingsSeed is too deep, dry, crusted, or poorly contacted
Check the top half-inch, firm broadcast areas, maintain moisture, and reseed promptly while the planting window remains.
BulbsMany leaves but very small rootsCrowding, late planting, drought, or excess nitrogen limited bulbs
Calibrate the next stand lower for larger bulbs, plant earlier, and use soil-test fertility.
GrazingAnimals scour or reduce intakeLush brassica forage was introduced too quickly
Remove animals, provide dry hay or other fiber, ration access, and consult a veterinarian or livestock adviser promptly.
SurvivalGreen crowns remain after winterThe stand did not winterkill completely
Terminate survivors before bolting and viable seed, then monitor volunteers in the next crop.
Termination plan
Verify winterkill and prevent spring seed
Many forage turnips winterkill near 10°F, but variety, snow, plant size, and cold duration change survival.
- Inspect: After hard freezes, cut bulbs and crowns; firm green centers remain alive.
- Terminate: If plants survive, graze or mow before flowering, then incorporate thoroughly or use an approved broadleaf herbicide according to its label.
- Verify: Scout again within 7–14 days and remove bolting survivors before seed becomes viable.
Urban Farmer's cover crop turnip
A leafy forage type with a large purple-topped bulb
The verified Barkant listing combines early maturity, high leaf yield, protein-rich forage, soil-conditioning roots, and winterkill potential.
Questions cover-crop growers ask
Cover crop turnips FAQ
Quick answers for timing, seeding, forage, grazing, winterkill, and rotation.
Are forage turnips annual or biennial?
Turnips are botanically biennial but are managed as annual cover and forage crops.
When should forage turnips be planted?
Plant in spring for summer use or about 70 days before a killing frost for fall forage and soil cover.
How much turnip seed is needed?
Use about 3–5 lb/acre drilled; broadcast rates are commonly higher. Follow local specifications and calculate by pure live seed where required.
How deep should Barkant turnips be planted?
Plant ¼–½ inch deep; the verified Barkant listing specifies ½ inch.
Do turnips need inoculant?
No. Turnips are nonlegume brassicas and do not fix nitrogen.
What soil benefits do turnips provide?
They scavenge nitrogen, suppress weeds, loosen surface soil, improve infiltration pathways, and add fast-decaying residue.
Can turnips be planted in a mix?
Yes. Grasses add fibrous roots and erosion protection; legumes can add nitrogen. Reduce turnip's component rate.
When can livestock graze Barkant?
Grazing commonly begins around 60–75 days or near 12 inches, after enough dry matter has accumulated.
How should turnips be introduced to livestock?
Introduce gradually, ration access, provide dry hay or other fiber and minerals, and monitor animals closely.
Will turnips winterkill?
Many types winterkill near 10°F, but snow cover and variety matter. Inspect crowns rather than assuming.
When should surviving turnips be terminated?
Terminate before flowering and viable seed, then scout again for regrowth.
Can turnips precede cabbage-family vegetables?
Use caution because turnips share brassica diseases and insects; rotate to a non-brassica cover where those problems occur.
Ready for cool-season forage?
Put Barkant leaves and bulbs to work.
Plant shallowly, manage grazing deliberately, and verify winterkill before spring.