I pulled out my hybrid broccoli weeks ago, and left four DeCicco sprouting broccoli plants. Those are pretty much done now and are coming out as soon as I get around to it. My month-old fall seedlings are in 4-inch pots, and will go out in a week or so. In my experience, the fall crop does much better than the spring crop.

I always leave mine and usually get a good secondary fall harvest. I plant the varieties that produce copious side shoots.

In your zone I think you would do better to plant new plants for fall. In the cooler zones they can sometimes get a decent second crop out of it but that never works for me in my zone.

Like planatus I ripped all mine out a month oe so back as it was well past done done and will put in new fall plants.

Dave

I think that new fresh plants will produce better quality broccoli.