My 9yr old son wants a garden this year but with all the trees around we don't have a spot that gets enough sun. I was going to make a 3'x6' one made out of landscaping timbers (3"x5" W/rounded sides) on wheels (so we could keep moving it to where the sun goes) but all I could find were pressure treated. Can I use them for gardening? Will the Arsenic in them get into the plants? Any ideas on what to use? It has to be somewhat pretty as it will probably be moving between the drive and the front yard.
Thanks,
Joe