I have a tree which wants well-drained soil but which is planted in clay (other than the good soil that was added around / below it).
Because of where it is, it can accumulate too much water, so I put gravel in the bottom of the hole and a piece of PVC pipe with small slits around it into the gravel and extending out the surface.
I manually pumped water out of the hole using this pipe, but is anyone aware of anything like perhaps a mini solar-powered pump which can turn on periodically to help keep this drained without manual intervention? Or any other ideas?