Soil Builder


Soil Builder is a mixture of KB Royal Annual Ryegrass, Crimson Clover, Hairy Vetch and Nitro Radish. This versatile mix will scavenge nutrients, fix nitrogen and establish quickly to combat weeds. No matter why you plant a cover crop, Soil Builder deserves consideration.


Soil Builder has to be sprayed or moldboard plowed in the spring before planting the cash crop. This versatile mix can be terminated early and still contribute a good amount of nitrogen due to the Crimson Clover. However, if the cropping schedule permits, letting this mix grow until the purple blooms of the Hairy Vetch can be seen will result in significantly higher nitrogen fixation.

Soil Builder

In the north, if this mix is planted after mid-August the radishes are not likely to perform to their potential. Below I-70, the date would be September 10th. Other species in the mix will still give tremendous benefits if planted a bit late.


Seed 18-25 lbs/acre. Drill up to ½" deep. Satisfactory results can be obtained by flying the mix on if the seeding rate is increased.

Soil Builder

  • Tremendous root growth
  • Crimson clover can fix up to 100lbs. of N
  • Can scavenge N left over by previous crop
  • Breaks into compaction layers
  • Can be flown on or drilled in
  • Has early spring growth
  • Increases rooting depth of next crop

Zones: 3, 4, 5, 6

Soil Builder Pie Chart Soil Builder Chart