Tilling Soil in Winter-?--Wait

Wait. Moving, working or tilling any soil during wet winter weather can damage the structure and air pockets. This may destroy the tilth or compact even the best topsoils. When the winter rains stop and you are done with heavy equipment, add topsoil high in organic matter. The more compost you can add to your compacted subsoil, the better. Organic matter is the great equalizer that both loosens compacted and clay soils and enriches sandy, loose soils, so that both can hold moisture but still allow for air and drainage. When soils like yours have already been compacted, you can save money with a design that takes poor drainage into consideration. Think raised beds and planting berms of topsoil with gravel paths and swales that can channel rainwater. Go here to read more. http://seattlepi.nwsource.com/nwgardens/346686_binetti10.html