We spaded the ground in our unheated greenhouse, removing weeds and debris. To spade, push your shovel in the ground and lift a shovel full of dirt out of the ground. Turn your whole shovel over and let the dirt fall back into the hole you just made. The point of doing this is to bring relatively untouched soil from under the ground to the surface, bury the organic material that was on the surface, and to break up the compacted soil.
