When In Romaine

This is my first time growing lettuce, at least since that long ago slug-infested lettuce patch that never made it in Oregon, 1995. We grew two varieties -a bib type and a romaine; seeds from Territorial. At first I was not impressed with the flavor of the romaine. Now I know why -I was harvesting too soon. Worried about bolting and hot June temps, we began harvesting head after head. But these big beauties, one tear of the leaf told me that they need a little heat, they need to mature in the field.