With no protection? Mid-to late May to be safe.

Here is a link that might be useful: The wealthy earth

Wow! Thank you so much for the link. I'm new to Utah and appreciate any help I can get.

Country girl- you should visit my blog for more ideas. I've been able to grow produce and veggies year-round in northern utah which can be a challenge. It's March 3rd and my vegetable gardens are almost completely planted. We save a lot of money, it's all organic(saves us even more), and the quality of taste is unmatched compared to virtually anything you buy at the stores. Come on over and check it out.