Morning Glories: Can someone tell me what I'm doing wrong?, 0 by woofie

woofie wrote:
I have these growing on my back porch, which has large east and south facing windows. There are two plants in the pot, one with plain green leaves and one varigated. The plants look great, but so far I have only gotten one bloom, from the varigated-leaf plant. I've been using Bloom Booster every week or two. I don't know what variety these are, the seeds were only labeled "Mixed Nils," so if anyone has a guess as to the identity of the bloom, that would be appreciated, too. What can I do to coax these guys to give me some flowers?!