12-01-2005, 01:59 PM
I have a place in Orchidland and I was digging holes for palm trees in lava rock. I pounded out holes 18" x 18" with a 5' long 1" around steel rod. They call it an " O'o" pole. Lava is harder than cement. One hole took me hours to pound out. I would rent a jack hammer or air chisel if I were to do that again. Raised beds s the way to go. I will be bulldozing a driveway and a house pad but not much more.