Tom, what are your temperatures like in Southern Maine?
Your broccoli would prefer a cooler temp and its size and no head tells me the same as TVETom mentioned, too much nitrogen.
As for your peppers, they prefer a much hotter climate PLUS adding blood meal to them would be a no-no...entirely too much N, contributing to foliage growth and not helping with flowering/production at all.
For peppers you'll want a more balanced plant food/fertilizer, adding plenty of phosphorus and potassium, not just nitrogen. And heat.
For broccoli just enough nitrogen for good early growth but also some phosphorus/potassium for good root/flower growth.
At this point if your broccoli is heading I think I'd hang in there and give it a change to mature. If you get impatient you can do as I have done, pull the leaves and cook them like you would cabbage or collards.
Pulling for ya!
Shoe
