Working the soil when it is too wet causes compaction which makes soil particles clump together, reducing the pore space between particles. This makes it more difficult for roots to penetrate the soil and leads to reduced water infiltration and increased runoff. While it may be tempting on those warm early spring days to dig up the garden, you should wait. The right time to work in your garden is when the soil crumbles slightly when you squeeze it in your hand. Add organic matter to your soil.
Organic matter is extremely important in improving soil structure and increasing pore space.
Organic matter improves the ability of the soil to hold moisture during dry spells. Worms thrive on soil organic matter and are excellent at improving the structure of the soil through their tunneling activities. Also, their castings or excrement is an excellent source of plant nutrients. Compost and peat moss are both excellent sources of organic matter. Mulch your soil.