“If you don’t have natural shade...”
“Little Gem Romaine also did well in the shade.”
I’ve got shade! I have ignored a long wood planter attached to one of the brick walls because practically no sun gets to the first one half of it and sun never gets to the second half. Maybe lettuce would grow there but it would still have to endure hot air, but it’s worth a try. I need to clean the dirt out of there and put fresh potting soil mix in. .
I’ll look in the BG catalog and I have a large Baker Creek Heirloom Seeds catalog. I’ll read about the Little Gem to see if it might not die in heat.
Worth a try. Usually, if you can get 6-8 hours of morning sun and shade the rest of the day, you can grow a lot of stuff that doesn’t particularly like heat.