Grow parsley in a deeply dug bed. Add a generous amount of rotted manure or finished compost to the bed several weeks in advance, or the previous fall. For summer crops, aim to grow plants in a place where they will receive some shade during the day – either on the east or west side of a structure or fence works well. For winter crops, start new seeds in late summer and transplant out to a warm, sunny location by September. Parsley will grow all winter (in mild areas) if cloche protection is provided.