I have 3 4' trees, and 3 large ceramic containers to plant them in. Each container has a hole in the bottom, but I'm pretty sure I'm supposed to put something in the bottom few inches to keep the soil off the bottom to allow for proper drainage. I have some lava rock in a flower bed we're getting rid of - would that be OK to use? My other option is I have a largish clay pot I'm not using and I thought I could bust that up in a bag and put some pieces in the bottom of each container (I think I saw that on a gardening show once?).
Either of these sound doable? I'm trying to use something I already have. Any suggestions or advice would be appreciated, thanks! :)