I had some Star of Yelta Morning Glories (looks like Grandfather Ott) . I think that was my first year gardening, but they sure jumped up and covered any support I could give them, then burst in heavy bloom for many months. That was in heavy clay soil, but I probably gave it a little fertilizer every 3-4 weeks.
It was like Day of the Triffids.
I know that I barely rescued seeds at the end of the summer, as rains turned them to moldy mush. Maybe any seeds that dropped, rotted. I tried to pick out some good ones, and stored them very dry, but I probably never tested viability. It was a scary-vigorous vine.
I did turn that bed after wrestling the MG vines into a wheelbarrow. Maybe turned it both Fall and Spring while trying to amend the soil. I certainly raked it several times to reduce the number of weeds. Some of those weeds might have been baby Triffids.
Gorgeous blooms. It truly looked like they had some brilliant light light shining up out of their throats.
