I had green caterpillars eating holes in the leaves of my broccoli and brussell sprouts. Since they are all the same species, perhaps that is what you have? They blended in really well and were tough to spot when they were small, but became more obvious as they grew. I usually found them on the inner leaves. I just picked them off manually and have seen no new caterpillars or leaf damage for weeks.

Thanks for pointing me in the right direction. Is this buttoning? Probably due to the heat and/or lack of water while sprinklers were being repaired. Are these edible? I am not sure I am brave enough to try!

Yup, I agree with nc-crn, it sure looks like white cabbage butterfly caterpillar damage. Those little green caterpillars really do blend in. If you can't find/smush them all, lol, you can spray the plants with a bacterial slurry (no chemicals) called Bt (Bacillus thurengiensis) which is a type of bacteria that kills only caterpillars. One of several brand names is Thuricide which you can find at most home improvement super stores and good nurseries. Keep us posted. Other than the slight foliage damage, that's a fine looking cauliflower plant! Happy gardening!

Cauliflower and eggplant have quite different temperature requirements. In most of US they don't grow at same time. Cauliflower Spring and/or fall Eggplant summer. Most varieties of Romaine produce a relatively tight bunch of leaves, but not a head. It also likes temps similar to cauliflower and quits when temps get to eggplant level.