I love this idea...stack pots with flowers. Very cheap way to have a small 'garden' on my front porch...
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How to Make A Terra Cotta Pot Flower Tower (or Crooked Tower) with Annuals - Perfect for limited spaces - an apartment or condo; home w/ small or no yard; deck, patio, porch or outside front door. Works well with fragrant herbs or a mix of flowers & herbs.| The Micro Gardener
A terra cotta flower tower - this could probably be done with herbs and such too, so simple!!