Last year I planted a sunflower house, using the pattern I found in the book "Roots, Shoots, Buckets and Boots". I used three different sizes of sunflowers and morning glories like the instructions said and it was a total flop. Well, the mammoth sunflowers came up gloriously but none of the other two sizes and only one or two of the morning glories. I assumed it was from lack of moisture but since we had a flood in June, it couldn't have been that. Has anyone actually had one of these grow?