we had such issues with soil fertility this year that we decided cover crops were a must for us. if we're lucky, the cover crops will help take care of our weed problem, too.
i love organic grower's supply handy dandy chart, which tells you all about the cover crops available. we selected two for our two gardens.
winter rye
and morton oats.
we simply sprinkled the seeds in all of our raised beds, even if there were still vegetables growing. a great place to use a cover crop is in your garlic bed, as soon as you harvest. broadcast your seeds, watch them grow, and then turn the cover crop under the soil before planting your garlic in october. cover crops definitely give your soil a boost, which in turn gives your vegetables a boost. win-win.
do you have any experience with cover cropping?