Q: I grow tomatoes in boxes I have built. I know one is supposed to plant tomatoes in a different place every year and I don’t want to just throw away the dirt in these boxes. I don’t have many places to put this dirt so my question is, “Can I put this dirt in my compost bins?” I have two cement block bins. What, if anything, can I do to that dirt to use it in the same boxes next year at planting time? It’s expensive to buy new dirt and I am poor.