I give the winter growers summer shade if they're in pots, but the best place to put them is probably in the ground. If that's not practical, maybe you could plunge the seedling pots into an earthen bed in the shade? Just how hot is it where you are? I'm in zone 9 near Berkeley, so the weather is maritime, and summer nights cool to under 60 degrees. Even so, winter growers in pots will suffer losses if given too much summer sun exposure. Jamie