In my back yard, they don't co-exist peacefully but do co-exist in a constant state of competition. Both are overwhelming my grape vines. My morning glories are blooming like crazy right now, but different types may bloom at different times.

I've got some Grandpa Ott's growing with my passi, they seem to be taking turns. The passi was blooming like crazy, and now taking a little break. The morning glory is taking over. It seems to be working well for me...both seem happy.

MG'S!!!! OMG!!!!
They are soooo Beautiful... BUT such little beasts!!! I swear I pull hundreds every day!!!
Passi's I guess I kind of turn my head for the ones in the ground..... Most of mine are in pots....
Chena

I have about 20 different MG varieties growing on the fence amongst my passies. There hasn't been any problems.
Karyn

LOL...One year I used MG's to shade the tomatoes from our west Texas heat....Worked real good the first yr... Now it is such a struggle.. They are so beautiful but just imposible to keep up with.. No way I can keep them from reseeding ..