The morning glories that I transplanted are blooming beautifully.
The morning glories planted from seed are healthy but not blooming.
Any idea why they are not blooming?

Hi Peggy and welcome to ATP!

I'm experiencing the same problem with my MG's they are blooming very sporadically when they should be blooming their heads off by now. I feed and water them regularly and I don't have a clue as to what's going on.

Peggy, do I understand that you started some MG's from seed in the ground outside, and also started some indoors in potting soil and transplanted them outside? Or did you buy transplants?

Just guessing here, but the transplants might just have stronger root systems since potting medium is lighter and possibly was warmer than the soil outside. This might give them a head start, even allowing for transplant shock. (you must have done a great job of transplanting) If you bought the transplants, they might have been going a little longer than the seed started plants.

The other thing that can boost plants into blooming is a bit of stress. Maybe the transplanting was the little bit of stress those plants needed to get flowers starting. If you can stand to 'stress' the other plants by witholding water for a day or two, that might give them a kick. Let them dry out really well, but not wilt.

And are they different species of morning glories? I. purpurea typically will bloom sooner than I. nils and I. tricolor. At least, that has been my experience here.

Thank you very much for your reply.
The blooming morning glory transplants came from the man who mows for me. I'm not sure of the species.
I will ask how he started them. The flowers are a beautiful dark purple.

The seeds were Ferry-Morse (1) Scarlet O'Hara (2) Grandpa Ott and (3) Heavenly Blue (Ipomoea Tricolor).
I started the seeds indoors with bottom warmth then put them outside.
I have fertilizer sticks I could use if recommended.
Meanwhile, I will enjoy what I have.

Well, looks like in your seeds, you have one of each! Scarlet O'Hara is an I. nil, Grandpa Ott is an I. purpurea, and Heavenly Blue is an I. tricolor. Heavenly Blues hate me. I try starting them indoors and they all seem to die when I plant them out. Sigh. My understanding is that it's only I. nils that like to be fertilized, but I could be wrong about that. I'd always heard that if you fertilize other morning glories, you get lots of leaves and not a lot of flowers.

woofie said:And are they different species of morning glories? I. purpurea typically will bloom sooner than I. nils and I. tricolor. At least, that has been my experience here.

What woofie said.

Night temperature differences can make a difference also. Many plants, not just Morning glories will bloom less or even not at all when night time temps are higher. Our night time temps here have been around 78- 80º,. Don't know what yours have been but that might be having an influence.