Planting in rocks
Does anyone grow plants in/on rocks? We have some porous lava type rocks. My husband drilled out a hole about 3 inches wide and a couple of inches deep in it, then a 1/4inch hole through the bottom. Somehow, I don't think this will be a good home for plants. Seems to me that inspite of the bottom hole, the rock will absorb water, or water will get trapped in some of the spaces in the rock and it will keep the plant too wet.
Any opinions on this?