Broccoli is usually considered a cool season crop. This year's hot weather played havoc with many cool season veggies. Broccoli normally will put on a large head in late spring and if allowed to continue to grow will sometimes put on smaller heads at leaf nodes, which is probably what you have on the 2 other plants. These smaller heads can also be picked and used. You might let them grow for a little longer to see if they get any bigger, keeping a close eye on them to see that the flowers don't start opening before you pick. The other 3 plants I would probably go ahead and pull. You can plant a fall crop of broccoli if you can find the plants and depending on your first expected frost date.
In the spring I planted 6 broccoli plants --- at the exact same time I did last year. (Last year's harvest was perfect.) But this year we had an early heat wave (over 100degrees for 5 days in a row) and the plants didn't develop the broccoli heads. I let them continue, however, in hopes that they would develop broccoli later.
Fast forward to today, August 11th. On one of my broccoli plants I've got a head about 4" across. On the two next to it I've got an ABUNDANCE of leaves at the top of the plant. And with each leaf set there is a tiny little brocolli head (less than 1" at this point). On another plant I've got a single tiny head and on the last two... nothing.
These plants are very healthy and are now shading surrounding plants - as I had planned that they would be finished by now and gone. The large headed plant I will definitely let continue, but what about the rest of the plants? Would you leave them in and let them continue to shade other plants? Or would you just call it a wash and pull them out? We LOVE broccoli at our house, so if there is any chance that they will develop into full heads, now that it's cooler (ha! low 90s on a daily basis with an occasional couple of days in the 80s) I want to let them go.
What are my chances?
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