Ooops. A couple of my broccoli plants are buttoning. Looks like of my dozen plants (and a couple of my Mom's) are making cute little broccoli heads on tiny broccoli plants. I've heard this happens when the weather turns warm too fast or when the plants are kept in seed flats too long. I'm sure my error was in keeping them in my toasty cold frame too long - even though they were in the soil. Next year I will move them out sooner. On a several days this spring, I forgot to open the windows and the temperature went up into the 90's. Not what the broccoli's like.