delayed blooming is usually caused by to much fertilizer ....."flowering signals the end of growth" other causes to much water to little water etc.....
the morning glory is a annual & will only come back if there are seed in the soil

MG's like it dry and infertile, so back off on the watering! The ones growing on the fence in my yard never get watered and bloom nicely in mid-summer for us. They like hot dry weather. Even if they look all wilted in mid day sun, resist watering them. I've notice the ones growing at a nearby abandoned gas station flowering nicely, but their foliage looks awful. MG's like abuse for some reason. Ignore them for a while, and they might surprise you!!

Thank you! i have been watering them just as much as my other plants. Ignoring in process!

Yep, just ignore them and they will do wonderfully. As stated above they may wilt in the hot mid-day sun, but that is natural as they wilt to conserve moisture.

Be careful what you wish for, I planted MG's 5 years ago and I gave never planted them again, but I do pull out 30-100 seedlings every year to keep it 'neat'.

Happy Gardening!

Keriann~

Morning Glories do best in full sun, especially morning sun. Do you have too much shade? Also, I have grown morning glories that bloomed like crazy in Texas clay, but living in a place with cooler nights and sandy soil resulted in stunted growth and sparse bloom. Not sure if it was the temperature or soil type which caused the difference.