Is it normal for a Mandevilla to completely turn brown during normal dormant time? I covered it during frost, but it turned all brown and looks dead. It was so pretty all summer, hope it will come back. Thank you.
Unusually cold weather can wreak havoc on plants like these. If the leaves are brown, then the leaves are dead, but it may regrow from the stem if the stem is alive. This article will help you figure out if the stem is alive: https://www.gardeningknowhow.com/plant-problems/environmental/how-to-tell-if-a-plant-is-dead-and-how-to-recover-an-almost-dead-plant.htm
My mandevilla leaves turned yellow and dropped off. This has happened slowly over two week period. Some leaves still remain. The one night that we did have a significant cold temp I did cover the plants.
Leaf yellowing is due to stress of some kind. This article should help you determine what the cause may be, likely the cooler temps: https://www.gardeningknowhow.com/ornamental/vines/mandevilla/yellow-leaves-on-mandevilla.htm
I have a mandevilla/Dipladenia. Brought it in for the winter and put it in a paper bag, as I have been doing with my geraniums for years. Just pulled them out this afternoon. Geraniums are showing some growth but the Dipladenia shows nothing. I want to put it in a flower pot and fertilize as with the others. Do you think I will have any luck? Or have you heard of anyone doing that with this plant? Thanks for your time :) Julie
My best guess and from a bit of research your Dipladenia would no longer be a viable plant.
No harm in putting it in a pot and doing the 'wait and see' approach. That's the fun of gardening, sometimes you get a surprise!
Here is a link about the care of Depladenia.
https://www.gardeningknowhow.com/ornamental/vines/mandevilla/growing-a-dipladenia.htm
The blooms never open up and just fall off.
The cause could be cultural (watering, fertilizing, etc.) or improper site conditions. I would review the following article to ensure your mandevilla's needs are being met:
https://www.gardeningknowhow.com/ornamental/vines/mandevilla/mandevilla-plant.htm
Temperature could also be to blame - specifically temperatures that are too cool. Has your plant been exposed to cold temperatures (below 50F)?
Are there any signs of an insect infestation, such as aphids? Information on aphids can be found here: https://www.gardeningknowhow.com/plant-problems/pests/insects/homemade-aphid-control.htm
For information on how to get a mandevilla to bloom, please visit the following link:
https://www.gardeningknowhow.com/ornamental/vines/mandevilla/getting-mandevilla-to-bloom.htm
My Mandevilla plant is on its third year. It has wintered over wonderfully and I would like to have it back on my balcony for the summer. It will have a west exposure with some good sun late in the day. It has loved this setting and I am hoping it will continue to be a showstopper.
You should be able to continue getting blossoms on your Mandeville. They make a great patio plant.
I have listed a couple links for you, with potting, trimming and fertilizing recommendations.
I would not move your plant outdoors until temperatures are above the 50 degree night temperature.
https://www.gardeningknowhow.com/ornamental/vines/mandevilla/mandevilla-plant.htm
https://www.gardeningknowhow.com/ornamental/vines/mandevilla/yellow-leaves-on-mandevilla.htm
Purchased pink hardy mandevilla plant about 6 weeks ago, two plants in 1 gallon containers. Transplanted to larger 5 gal pots with mix of sandy potting soil. Both plants have done very well, full of blooms. Plenty of rain, however, and pots seem to drain weak. Suddenly, one of the plant's leaves started curling and turning yellow and drooping. The other plant has a few curled leaves, no yellow leaves. Have not observed pests. Any clues?
This article discusses yellow leaf curl in mandevillas:
https://www.gardeningknowhow.com/ornamental/vines/mandevilla/yellow-leaves-on-mandevilla.htm
I left my 2 mandavilla out during the winter and it was very cold and snowing. Will it come back to life this summer?
Mandeville is a frost tender perennial. It would not be winter hardy to temperatures below 50 degrees.
Most likely your plant did not survive the winter.
Here is a link to the care of Mandeville.
https://www.gardeningknowhow.com/ornamental/vines/mandevilla/mandevilla-plant.htm