Everyone knows the value of cover crops or green manure: they add valuable organic matter to the soil, they prevent erosion, smother weeds, and help maintain soil moisture levels. The ability of pea or other legume crops to fix nitrogen makes them especially valuable as a soil addition. Most cover crops are planted in fall, given time to overwinter, and then turned back into the soil in spring. But is it possible to plant a cover crop in early spring and still reap benefits?
The answer depends on where you live. High altitude locations or those in zones three, four and higher are at a disadvantage. There’s usually only a short window between the last frost (or snow!), something that can happen as late as June, and the heat of the growing season. But zones five and above, especially those at non-mountainous elevations without micro-climate extremes, allow for a spring cover crop when specific conditions are taken into account. (more…)