Aaron, We have given up on any spring cole crops. I try to plant early september and hope for rain in order to grow them big
enough to go into the winter. Collards and kale can take some freezing. Other greens, like mustard and turnips seem to do better into fall also.
We had been told to plant some things late...like squash, to avoid squash bugs, but by then the heat interferes with growth and pollination.I don't use BT. I really believe that the 'good bug' will show up eventually and balance things out. We have seen some of the tiny preditor wasp eggs on tomato worms.
"We're all just walking each other home." -Ram Dass
"Be a lamp, or a lifeboat, or a ladder."-Rumi
"It's all one song!" -Neil Young