Soil First SF Select Radish brassica cover crop was selected based on performance in the field. This new daikon-type radish variety was evaluated across many different soil types and environments from the Northwest to the upper Midwest and Transition Zone. SF Select Radish is a superior, deep penetrating taproot is one characteristic that separates it from other varieties, growing to a level of 3-6 ft., based on soil type, region and planting date. The upper portion of the taproot (or tuber) can grow to a length of 12-24 in. SF Select Radish brassica will germinate in only a couple days when moisture is present.

  • Reduces compaction and improves drainage and air/ water movement (through rapid spring decay)
  • Soaks up and releases nitrogen and other nutrients in spring when cash crops need it most
  • Dense seed makes for easy planting, typically reaching full growth in 6-8 weeks (about 900 GDD)
  • Shades out winter annuals and suppresses spring annual weeds
  • Winterkills with temperatures in the teens

Visit our Mixes page to explore premium Soil First mixes blended with different brassica varieties. View mixes.

Soil First

Non-Forage Benefits:
1 = Poor; 5 = Excellent

Compaction Alleviation: 5
Weed Suppression: 5
Biomass Production: 4
Erosion Control: 4
Disease/Pest Control: 3
Pollinator/Beneficials: 2
P & K Cycling: 4
Ease of Establishment: 5

Nitrogen Fixer/Scavenger: Scavenger

Nutritional Value:
Values Vary Greatly Depending on Maturity

Crude Protein: 18
NEL¹ Mcal/lb.: .73
ADF%²: 26
NDF%³: 21
TDN: 70
DM Tons/Acre: 2-4
Days to First Harvest: 45
Days to Next Harvest: –

¹- Net Energy for Lactation = Energy available after subtracting digestive and metabolic losses
²- Acid Detergent Fiber = Low values mean more digestible
³- Neutral Detergent Fiber = Low values mean cows can eat more

Ranking (Good, Better, Best):
Graze: Best
Baleage: Not Rated
Chop: Good


Planting Time:

Seeding Rate:
Mono (lbs./acre): 3-8
Mix (lbs./acre): 1-3
Forage (lbs./acre): 5-8

Seeding Info:
Carbon/Nitrogen Ratio (C:N): Tops- 9:1
Seeding Depth (in./with drill): 1/4
Seeds/lb.: 30-40,000
Bulk Density (lbs./ft.³): 44
Aerial Application Rate: 3-8
Germination Soil Temp.: 45 F
USDA Hardiness Zone: 9
Days to Emergence: 3-5


    • Benefits from nitrogen applications (30-60# N). Depending on goal, adding nitrogen and other nutrients may or may not be needed.
    • Grow best in pH 6–7.5
    • Avoid using radish in cropping systems with other brassicas (disease bridge –club root)
    • Radish produce a compound when decaying that omits an odor similar to natural gas

Brassica crops can cause animal health disorders if not grazed properly. Introduce grazing animals to brassica pastures slowly (usually over 3-5 days). With extremely high forage values, brassicas can cause problems if hungry animals are turned out into predominate brassica pastures. Even though traditional recommendations allow for 2/3, we actually recommend keeping brassicas to under 1/3 of the grazing animal’s diet- always supplement brassicas with dry hay or other grasses (higher in fiber).

We’ll continue to update this tab, so please visit periodically to see additional information and resources including product data, testimonials, photos, marketing material and more.