This is interesting and a mistake at the same time. The interesting part is that this morning glory has two types of flower on one vine as you can see by my pictures.
The mistake is that I planted it in a pot to vine on the post that holds up the cover on the deck. During the last few days with the tempatures in the 90s it uses up all the water that I give it the night before before I get home from work to water again.
The last pic was taken 08/05 and you can see how big it has gotten already. But it doesn't have a lot of blooms yet. It could be more blooms will be setting on soon or the fact that it is in a pot and doesn't get all the water it needs daily might keep it from blooming more. Will wait and see.