To dig up and turn over soil or some body of soil with or as with a spade. A noun or pronoun can be used between "spade" and "up." You'll want to spade up the flower bed and mix in some fresh compost before sowing the new seeds. The ground was so full of stones and weeds that spading the soil up was an absolute chore.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
spade something up
to turn over the soil in a garden plot with a spade. Please go out and spade the garden up so I can plant the potatoes and onions. I will spade up the garden when I have time.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.