Planting cover crops — green manure — early enough in the fall has always been something of a problem for me. We all know the advantages that cover crops give our soil. They blanket it over the long winter, protecting it from erosion, keeping it from hardening and preventing the leaching of valuable nutrients by rain and snow. Their roots keep the soil aerated. They protect against the dangers of a deep freeze, thus preserving beneficial microbes and other organisms that help keep your soil healthy. They help prevent the spread of weeds. Best, cover crops add green material to the soil, material that supplies nutrients as well as nitrogen. They’re one of the most valuable tools in the organic gardener’s playbook.
Those cover crops, no matter what kind you’re planting, need to go in ahead of the first frost so that they have a chance to become established before the long cold winter sets in. The problem with that is that our gardens are usually producing right up until the first frost. We’re not anxious to pull our still-productive vegetables from the ground to make way for cover crops. Is it okay to plant cover crops later in the fall? Yes, depending on the conditions. (more…)