Once March arrives, remove all weeds and dead plants from your soil when first heading outside. Your garden should be bare except for any perennials that have started to peek out of the soil. Then, place a layer of compost over every bed. This will put more nutrients in the soil. In beds that had held annuals only, use a shovel or rake to mix in the compost and turn the soil. Do not step in any of the beds while doing this. You want loosen the soil, not compress it under your feet.
After this, you can start planting any early spring crops. Once you begin to put plants in the ground, it will then be time to water and remove weeds on a regular basis.