Mandevilla, also known as Dipladenia, Brazilian jasmine and rock trumpet, is a woody climber native to tropical Central and South America. It has gently scented, vibrant blooms and makes a fine conservatory plant in the UK.
The name ‘Mandevilla’ is derived from the surname of a British diplomat and plant enthusiast named Henry Mandeville (1773-1861). While Mandeville didn’t directly discover or introduce the plant, the name was given in his honour by the botanist Charles Hamilton, who named the genus after him.
Mandevilla plants are evergreen, so they do not lose their leaves in winter. However, they may experience some leaf-drop if exposed to cooler temperatures.
Bear in mind that mandevilla is toxic to dogs and cats, and can lead to stomach upset, nausea and vomiting if ingested.
How to grow mandevilla
Grow mandevilla in a sunny, humid spot such as a heated greenhouse or conservatory, in free-draining soil or a large pot of loam-based compost with added grit to aid drainage. Train it up a trellis or obelisk to make the most of its fragrant blooms.
Where to grow mandevilla
Humidity is key to successfully growing mandevilla – spring conditions should be humid with an average day time temperature of 21ºC and a night time temperature no lower than 18ºC. Winter temperatures shouldn’t fall below 15ºC. The best places to grow mandevilla are therefore conservatories and heated greenhouses, where conditions best mimic their natural tropical environment.
If possible, grow mandevilla direct in the soil of a greenhouse or conservatory border. Being a large, woody climber, it can struggle in pots.
How to plant mandevilla
For best results, plant mandevilla direct into the greenhouse or conservatory border, adding horticultural grit
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