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My husband and I planted marigolds and herbs (dill, parsley and basil) in the 2 holes of each cinder block surrounding our small garden plots. This would be especially good for peppermint and catnip that tend to spread all over.
I like to use old cinder blocks to plant things in. When they get big enough, I move them. It is hard for the birds to get into the block or the cats to dig them out before they have grown big enough to transplant.
We have a few cinder blocks in our front garden. I plant things in them. During the cold months, I cover them up with tiles I bought from the home improvement store.
This is a page about making a cinder block step planter. Cinder blocks are great containers for alkaline loving plants, and work well to create a layered planter.
