Cut a head now if you feel like having it for dinner. After the head
is cut, the plant will start producing secondary (my term) heads all
over the plant.
The crop I got from my secondary heads, on 1 plant, was more than 2
or 3 main, large heads. The secondary heads don't grow very big, but
taste great. I keep cutting small heads off long into when the planty
starts flowering. lots of the heads I cut are only 1" in dia. but
wonderfull.
The brocolli just kept comming and comming!