I wanted to create a summer shade with morning glory. I built a tree-shaped trellis with a lumber and threads, and it worked very well. I planted mix seeds, and they grew aggressively, blooming from early summer to the first frost. Grandpa Ott bloomed early and the Heavenly Blue bloomed late summer and early fall. They have tolerance for poor, dry soils, so I didn't take care them much, just watering.
2014
I didn't grow morning glory after 2014, but growing them just once resulted a lot of reseeding. They still pop up (in 2015 and 2016) under the fence where they were planted in 2014.
Heavenly Blue, Late summer in 2014