Annuals: Flannder's Poppy or corn poppy, 1 by Bug_Girl

Bug_Girl wrote:
I am have so such trouble with Flannders poppies, this year. Some of them grew very tall before blooming and then fell over. There are not blooming as much as the should. What could I be doing wrong? I thought they were easy to grow? Some of them turned yellow and died for no reason at all. I planted them in March, and I think I was a late on planting. This is a photo of one of flowers for id purposes.