Question
Hello!
I have a very invasive morning glory that I planted this spring, however, it has not bloomed. I also planted another at the same time, and then moved it to a different location as it was not doing well where it was, it has bloomed and it is not nearly as large as the other one.
I had no idea that the large one would take off so fast!It has taken over our privacy fence, our lilac bush, and I am constantly cutting it back, on a daily basis.
What can I do to get the plant to flower, rather than grow like crazy?
I am not sure what type of morning glory it is, but the flowers on the smaller plant are a purplish/ blue with white centers .
Thank you, for any help that you may provide me with.

Good day!

Answer
Hi, Lisa -
Morning glories require lots of sunshine, so the first thing to look at is the exposure of your larger plant.  Does it receive at least six hours of direct sun every day?  Did you move the smaller one to a sunnier location?  If your larger plant is not getting enough light, is it possible to prune back whatever is nearby to let a bit more sunshine hit the plant?  
The second thing to examine is your soil.  Too much nitrogen in the soil can contribute to lots of leaves and little flowering. Try adding a just a bit of phosphorous (the middle number on bags of fertilizer) to jump-start the blooming process.  Finally, certain morning glory varieties (such as Heavenly Blue) are naturally late bloomers, and may take as long as 120 days to produce flowers. I have gotten this variety to bloom in as little as 60 days, but that could have just been pure luck.
Morning glories are certainly invasive, and I always advise people to be very careful where they put them.  Mine are in pots, trellised to the columns on my porch, and I cut them back every fall and bring the pots into the garage.  But if yours are in the ground, perhaps some phosphorous and sunshine could do the trick for you.
I also know that morning glories do better in "poor" soils.  So, too much fertilizer of any kind is not a good idea, nor is too much watering.  Hang in there - they may just surprise you and take off over the next couple of weeks!