I would just like to add this tip, since the time of year calls for it.
When the threat of frost looms large on this outdoor grower, he protects his crop with a 5 gallon pail of water....or as many are needed. I fill a pail with warm water and place it in the middle of my 20' x 20' garden and frost never touches inside the barrier of protection. One 5 gallon plastic pail filled with water, protects an area about 20' x 20'.
I hope this tip helps save someone's time and energy!