Crop Type Seeds/Lb Minimum Germination Temperature
Warm Season Broadleaf 18,000 50°F

Buckwheat is a great addition to a cover crop mix. It has root exudates that make soil phosphorus more available for subsequent crops and has been shown to build soil structure. It flowers within six weeks of planting, attracting many pollinators and beneficial insects. Flowers lead to seed production, which will occur throughout the summer. Buckwheat contamination has been found in a wheat shipment to Japan and in order to maintain the market NRCS has recommended buckwheat not be grown in a field two years prior to wheat production. As a broadleaf, controlling buckwheat in a small grain can be done with herbicides (Bromoxynil, dicamba, Curtail M, and harmony, A687 NDSU).

Nitrogen scavenger Soil builder Prevent Erosion Weed Suppression Grazing Quick Growth Lasting Residue Make P and K Available Loosen Topsoil Suppress Disease Attract Beneficial Insects
1 3 2 5 1 5 1 5 4 0 5

1 = Poor and 5 = Excellent Source: Managing Cover Crops Profitablity, 3rd Edition, SARE