My friends at Garden Supply have a neat article called When is it Warm Enough to Plant? It’s a neat approach to knowing what to plant in your garden without having to study each and every seed packet that you buy and looking up Gardening Zones, etc.  While a zone is great for a broad range rule of thumb, this article will explain and chart the optimal temperature for planting as well as the temperature for germination! Another reason why Garden Zones are not fool proof is that they have recently changed. Whether you attribute those climate changes to our global warming or not, the fact remains that the zones…