Best Summer Cover Crops

For weed suppression and a major boost to soil fertility, sow these four fast-growing summer cover crops in any patch possible, even during your prime gardening season.

Sunn Hemp Cover Crop Growth
Sunn hemp undergoes an impressive growth spurt from two weeks (shown here) to four weeks. In dense plantings, it can set more than 120 pounds of nitrogen and 5,000 pounds of biomass per acre—or twice that if you cut the crop back, stimulating branching and additional root penetration.
Photo by Harvey Ussery