I believe that I have the same type of morning glory. I guess it depends on your idea of "invasive." Do they re-seed like crazy? YES. But to me, that's good! :) They didn't spread much further than where they were last year but they were much thicker. To "contain" them (they're by a fence but I don't know if the neighbors would want them on their side), I put 3 huge stakes in the ground, pretty far apart, and just put wire along the top. Then I tied strings to the wire and ran the strings to the ground - tied a nail to the end of the string and stuck it in the ground. Easy and cheap, and the morning glories are growing on it nicely and leaving the fence alone. :)

Yeah. He's not going to like the re-seeding part at all! Someone on vines thought this variety was a sterile hybrid and therefore can't reseed itself. Anyone else heard of that? Thanks.

The wild ones reseed like crazy. I've had very few of the named varieties even sprout. But even with the wild type, the sprouts are very easy to pull. All the vines will die with the frost, what you'll see next year are seedlings. Snip the seeds and/or pull down the dried vines and you'll cut down on the seedlings next year.

Thanks! I think I'll let it grow this year, and then work on pulling seedlings next spring if they start coming up like crazy.

julia123, thanks for that great idea for keeping them off the neighbor's fence and for easy removal. I'll try to keep that in mind if I ever grow them.

Heavenly Blue morning glories are not often heavy reseeders because most of them do not bloom heavily until late in the season. Last year I finally got one to bloom in July!!! It has produced a few volunteers. This is the first time I have ever had any volunteers from Heavenly blue after any years of growing it. Yes, the little wild ones are very invasive and really shouldn't be raised probably as they can spread to fencerows and farm fields badly.

I also don't have a problem with 'Heavenly Blue' reseeding. Most years that I grow it I don't get any seedlings from it.

Now other varieties....that's a different story. :-)