Mandevilla is a tropical plant that boasts beautiful, trumpet-shaped flowers. Also known as a rocktrumpet, the plant is a magnet for pollinators such as hummingbirds, butterflies, and bees who are drawn to its delectable nectar. Mandevilla varieties include both mounding and vining types. Create a garden focal point by providing a trellis or other form of support for the vines as they grow.

Sunlight Requirements

This tropical beauty requires a minimum of six hours of direct sunlight. Anything less will reduce flower production and cause the plant to become spindly. Too much afternoon heat can hamper growth as well.

Soil Conditions

Mandevilla prefer rich, slightly acidic soil, however, it can actually tolerate a variety of soil conditions as long as it is well-drained and rich in organic matter. If growing in pots, keep in mind that it does not like to be root bound and will need to be repotted every few years.

Watering and Fertilizing

The plant is drought tolerant with wax-covered leaves to help it conserve water. Nevertheless, it will require routine watering one to two times a week but let the soil dry out in between watering. During hotter months, more watering may be necessary.

Be sure to fertilize the plant in early spring, and then use a liquid fertilizer that is about half strength every two weeks during blooming season.

Pruning

Light pruning will encourage more stem growth and therefore increased flower production. Cut back diseased and damaged branches as needed. Deadheading is not necessary. To make the plant fuller, pinch the growing tips off about ¼ to ½ inch.

Mandevillea can be grown in hardiness zones 9-11. It is possible to enjoy them in other zones, however, you must bring the plant indoors during the winter months as a hard freeze will kill it.

It also has storage roots, similar to rhizomes, that store nutrients for use primarily in the winter months.

How to Propagate

Mandevilla can be propagated by cuttings or from seed. Take a softwood cutting from a healthy stem and remove the lower leaves. Place the cutting in water overnight. The next day, dip the cut end in a rooting hormone and place it in moistened soil or growth medium in a warm, well-lit area, but not in direct sun. You can also cover the cutting loosely with a plastic bag to help promote growth.

Seeds can be harvested once the pods have dried on the plant. Open up the pods to remove the seeds, which are fluffy like dandelion seeds.

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Pests

Mandevillas are susceptible to mealybugs, red spider mites, and scale. These pests can be treated with a DIY insecticidal soap or neem oil.

Are Mandevilla Poisonous to Dogs?

If the plant is ingested by dogs, it can cause stomach upset, including nausea and vomiting. It can be more harmful to puppies than adult dogs, however, it will most likely not be fatal. Contact your vet for more information.

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