I planted some sunflowers around March 5th and they have been doing fairly well. They are already above my knee! But I'm concerned as to when they will flower and how hardy they will be. I'm moving in late May, and leaving my mom to tend to them. She tends to be of the "all you have to do is water it" mindset, and I'm worried this will keep them from flowering as large as I had hoped, or make them weaker. Just for reference sake I live in Florida.
So my question is, what can I do to make sure my sunflowers don't utterly fail in my absence?