Chenoa, I had a further thought on your early plantings. My first year here I planted 9 plants of broccoli all on the same day into my beautiful new raised bed. A couple of months later I was harvesting 9 beautiful heads of broccoli in the same week. Needless to say, that was too much broccoli all at once! I gave all the neighbors freshly picked broccoli that week. Then, well there was no more (fresh) broccoli for a couple of months as I had to buy and re-plant transplants in December.
The point here is, although broccoli will continue to produce side shoots, if you want to have a continuous harvest of broccoli, and also cauliflower you need to plant new seeds at least once a month so that you have a succession of plants to put out, and will have a succession of harvest as well.
I now start 3 cells of broccoli and 3 cells of cauliflower every 3 weeks starting in mid-August. My Earth boxes accommodate 3 plants very nicely. This gives me a well spaced harvest through the winter and spring months, enough for the two of us plus some to give away to friends as well.
I also think you're going to find your lettuce and spinach will get bitter, and bolt to flower if you plant them before September. Our sun is just too hot, and days are still very warm until November.
