well my experience is that once you have any kind of morning glory even if just one vine survives to go to seed you will have them forever. Its good you love them!
Joann

Joann,
Thank you for your feed back. Yes, I love them so much I'm even growing the infamous "Noah" again this year. Although I ripped out the vine in full flower, a few seeds survived. Have you ever noticed the leaf to the Noah? So beautifully formed. Yes, I like all Mg's except for maybe Shiva. Do you grow MG"s? :)

Mine never come back. Zone 7a.

bogturtle, that's what I'm talking about. Some people say that this MG grows so easily, others not so. Next year I think I'm going to plant MY own personal seed,and then buy three more packs from the store and plant them. Last year they were so thick and healthy, but were hit with the frost before the blooms could open. I planted too late. Maybe next time I will get it right. :)

Dena - Good you have your Ipomoea tricolor blooming as others reported difficulties getting this species to grow this year...not sure exactly why...apparently not always the 'rampant' grower, depending on conditions...e.g., soil, light, rain , etc.,...

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Generally :

Ipomoea tricolor , like most tropical Morning Glories very rarely have seeds that will survive repeated freezes and thaws...

The ONLY species sold commercially in stores or most catalogs that will reseed in colder zones is Ipomoea purpurea and the THOUSANDS of other species , which unfortunately are usually not available to those outside of the trading circuits , do not successfully self-sow in colder zones.

There are double forms of Ipomoea nil which produce few precious seeds.

There are many different species of Morning Glories which are NOT invasive and those people who really know the most about Morning Glories and have the most experience with the many different species will know that...

Extrapolating the behavior of a few onto the many is not accurate...

The highly bred large Japanese Asagao aren't found growing wild anywhere (!)...

Here is a great site devoted to Morning Glories:
http://protist.i.hosei.ac.jp/Asagao/Yoneda_DB/E/menu2.html

Here is a link that might be useful: Most Morning Glories are not invasive and will not successfully resow

This post was edited by ron_convolvulaceae on Tue, Jul 22, 14 at 5:46

Good growing, Dena, show photos, please.

Wow, thanks to all your guys, for the feed back, and the good points from our MG expert Ron! Joseph I'm looking forward to your pics. this winter where we will dream of the next batch Of vines to plant come Spring. I'm hoping my Heavenly Blues will germinate, I may plant only those, and moonvine. The yard looks like a jungle, and I do have other interest that need attention. :) Arum, (Dena)