The main problem is remembering to water regularly, not just during dry periods. Because the shelters are open, the plants don't get particularly hot, but you can create a microclimate by sheltering from the wind, or you *could* wrap polythene all the way around. I'm watering every three days now it's cooler.

This picture shows my arrangement. Thanks for posting btw, I'm glad you're feeling better and getting stuff done. :-)