Radish Doublemax


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All orders are sent using Canada Post Flat Rate Shipping. Same price no matter how large or small the order. Order cover crops now and plant in spring, summer or fall! Seeds will store for at least 1 to 2 years. 

Remember that ¼ to ⅓ of your growing area should be planted to green manure cover crops every year. This ensures your soil stays healthy and productive over time.


One of our favourite choices of cover crop that we use on our farm every year!

Radish Doublemax is a type of Fodder Radish (sometimes called Tillage Radish) that is used as an excellent natural biofumigant. It helps to prevent or reduce populations of many damaging pest nematodes while supporting soil health. It is a perfect cover crop planted before or after most vegetables such as garlic, potatoes, beets, carrots, beans and cucumbers. 

The succulent plants have rapid top growth and form a complete canopy that is well suited for erosion control and weed suppression. Radish DoubleMax has a long slender lower taproot that can grow up to several feet deep helping break up compacted subsoil. The swollen upper taproots release nutrients when decomposing and help to improve soil tilth.

Radish Doublemax is a late flowering variety, which allows for added root and top growth. Seedlings are tolerant to frost (-3°C), however, it is best to plant in late spring through early fall to delay flowering and maximize biomass development.

Plants will generally winterkill and can either be tilled in summer, late fall or spring after they have been killed from freezing.

Untreated, Non-GEO Seed

250g covers approximately 1500 sq. ft
1 kg covers approximately 6000 sq. ft

Quick Guide

  • Latin Name: Raphanus sativus
  • Hardiness: Annual, will usually winterkill
  • Growth Rate: Fast
  • Germination: 7 days
  • Planting Dates: May 21 - Sep 1  
  • Seeding Rate: 100-200g per 1000 sq. ft (4-7kg per acre) 
  • Max Planting Depth: 0.25”-0.5” 
  • Growth Habit: Grow 2-3 ft tall. Seedling develops as rosette, then elongates with the flower stalk  
  • Benefits: Fast-growing, biofumigant, loosens compacted soil, quickly releases nutrients when decomposing.  
  • Sun Exposure: Part Shade to Full Sun
  • Usual Seed Life: 5 years  
  • Cover Crop Management: Mow or till at 25-50% blooming. Will replant itself if left to go to seed. Tilling maximizes the biofumigation process.

Highest Quality Standards

Our cover crop seed comes from high-quality stock and is tested for germination. We've selected the best varieties available in order to maximize each species potential.

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