1. Clear the garden. Remove all plants from the garden, including any weeds. If you have any diseased plants, be sure to dispose of them properly so that the disease doesn't spread to other plants.
2. Test the soil. This is an important step to determine what nutrients your soil may be lacking. You can purchase a soil test kit from your local garden center or nursery, or you can send a sample of your soil to a soil testing lab.
3. Add organic matter. Organic matter, such as compost, manure, or peat moss, helps to improve the soil's structure and fertility. It also helps to retain water and nutrients. Spread a 2-3 inch layer of organic matter over the garden soil and work it in with a shovel or tiller.
4. Add fertilizer. If your soil test results indicate that your soil is lacking in certain nutrients, you can add fertilizer to make up for the difference. Follow the directions on the fertilizer package for the correct application rate.
5. Cover the soil. After you've added organic matter and fertilizer, cover the soil with a layer of mulch, such as straw, hay, or leaves. Mulch helps to protect the soil from the elements, retain moisture, and prevent weeds from growing.
6. Let the soil rest. Now that you've prepared the garden soil, it's time to let it rest for the winter. This will give the organic matter and fertilizer a chance to break down and release their nutrients into the soil.
By following these steps, you can prepare your garden soil in the fall and give your plants a head start on next year's growing season.