After several days of sporadic rain, then intense sunshine, I went to see how my sunflower was faring. It had grown! Last time I'd checked on it, the flower had barely bloomed. The face was about the size of a baseball and it was following the sun. It was tall then, but I think it has become even taller. The head is already so heavy that it can't hold itself up to follow the sun anymore..
I've been growing it as food for the birds next winter. I think this may last several days. Anyone know how I'll know when it's time to harvest?