I doubt it since to my knowledge they do not spread by rhizome or anything like that -- and often die each year due to winter, at least where I live.
There is a decent chance that you just don't catch the seeds at the right time? However, I've seen the seed pods hang onto the plant for at least a year on the fence at which I have morning glory growing on.
I think you perhaps need to look a bit harder, and at a better time of the year. Later in the fall is probably the best time for morning glory seeds.
Are you sure they are morning glories? Also, are they the Ipomea tricolor or I. violacea?
There is a decent chance that you just don't catch the seeds at the right time? However, I've seen the seed pods hang onto the plant for at least a year on the fence at which I have morning glory growing on.
I think you perhaps need to look a bit harder, and at a better time of the year. Later in the fall is probably the best time for morning glory seeds.
Are you sure they are morning glories? Also, are they the Ipomea tricolor or I. violacea?