This week is our first week of non-90 degree weather and I was thinking that I should probably get the lettuce and spinach in the ground pretty soon. We replaced a window and I was thinking of making a cold frame out of the old window. Should I let the lettuce germinate and then put on the cold frame or do I need to wait for cooler weather before putting the cold frame on? Just to clarify: I'm considering a cold frame to be 4 bales of alfalfa or straw with a piece of glass on top. Lows are in the upper 40's to mid 50's. So it's not like I have an immediate frost to worry about. I believe the frost date for my area is Oct 10th, though.
Any advice or suggestions is more than welcome.