How I'd love to have really sweet lettuce, like I get in our local store. I've tried growing different kinds of lettuce for about four years and every time they taste kind of bitter or sour. Never sweet. I've tried adding lime, compost, more water, shade cloth for various kinds (Red, curly, romaine, simpson's, etc.) with absolutely no change. Might there be some nutrient that I'm missing that's keeping my lettuce from being sweet? Any other ideas? The last tip I got was to pick in the a.m. and put the leaves in the fridge. So far, no luck. :-(
Grateful for help!