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Why Does My Mandevilla Plant Not Bloom?

By Cas Schicke ; Updated July 21, 2017

The mandevilla is a beautiful vine with large, trumpet shaped flowers that are enhanced by large, glossy puckered leaves To keep your mandevilla blooming there are a few requirements.


Full sunlight and warmth are necessary to help the plant bloom. However, during extended hot spells the plant will need to be watered daily or, if potted, moved into a shady area.


During the growing season your mandevilla will require a high phosphorous (10-20-10) fertilizer every two weeks to encourage blooming. All leaves and no flowers indicate a high nitrogen content


The mandevilla should be planted in a well-draining soil. Allow the soil to dry out before watering. The plant is sensitive to over watering.


Besides the need for well draining soil, the mandevilla needs enough soil. If planted in a container it should have at least 8 to 12 inches of soil. It does not need to be root bound to bloom.


A sun lover, a mandevilla likes it warm and mildly humid. It is a tropical plant. If the temperatures drop below 65 degrees for any period of time, blooming will stop.


About the Author


Cas Schicke is a freelance writer with numerous published articles. Her topics of interest pertain to home and garden issues. Sharing knowledge about the why or how of growing things or useful home information is the main ingredient of Schicke's published articles. Her articles have been published in eHow and GardenGuides.