Amending clay with holes 1.5" wide x 3' deep
Newby here. I want to plant four paw paws and two carmine jewel cherries in clay, which they are supposed to tolerate. I have a soil augur that can drill holes 1.5" wide x 3' deep. I hope to create drainage in the clay by digging planting holes large enough to encompass the ultimate drip line of each plant and drilling maybe 20 holes into the bottom of each hole, and filling the drilled holes with large pebbles.
Do you think the holes would drain excess water away effectively?
Thanks for considering my question.