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How to Grow Dipladenia Plant Outdoors

Updated: June 10, 2022

Dipladenia, also known as Mandevilla, is a beautiful flowering plant that can be grown outdoors. This tropical plant is native to South America and is known for its stunning flowers that come in various colors such as pink, white, and red. It is a great addition to any garden or patio area and can add some much-needed color to your outdoor space. Here’s a guide on how to grow Dipladenia plant outdoors.

Choosing the Right Spot

Dipladenia requires plenty of sun exposure to thrive, so it’s important to choose a spot that gets at least 6 hours of direct sunlight per day. The soil should be well-draining and rich in nutrients. If you have heavy clay soil, amend it with compost or sand to improve drainage.

Planting Dipladenia

Dipladenia can be planted in pots or directly in the ground. If planting in pots, choose a container that is at least 12 inches wide and deep. Fill the pot with potting soil and add some slow-release fertilizer. Dig a hole in the center of the soil and place your Dipladenia in it. Fill in the hole with soil and press it down gently.

If planting directly in the ground, dig a hole that is twice as wide as the root ball of your plant. Mix some compost or sand into the soil and add some slow-release fertilizer. Place your Dipladenia in the hole and fill it in with soil. Water thoroughly after planting.

Watering and Fertilizing

Dipladenia requires regular watering, especially during hot weather. Water deeply once or twice a week, depending on how dry the soil is. Avoid letting the soil dry out completely between watering as this can lead to root damage.

Fertilize your Dipladenia every two weeks during the growing season with a balanced fertilizer. Stop fertilizing in the fall and winter when the plant goes dormant.


Pruning is important to keep your Dipladenia looking neat and healthy. Prune any dead or yellow leaves as soon as you notice them. You can also pinch back new growth to encourage bushier growth and more flowers.

Pests and Diseases

Dipladenia is susceptible to pest infestations such as aphids, mealybugs, and spider mites. Regularly inspect your plant for signs of pests and treat them with insecticidal soap or neem oil.

Dipladenia can also be prone to fungal diseases such as powdery mildew and leaf spot. Avoid overhead watering and provide good air circulation around your plant to prevent these diseases. If you notice any signs of disease, treat them with a fungicide.


Can Dipladenia survive cold weather?

Dipladenia is a tropical plant and cannot survive temperatures below 50°F. If you live in a region with cold winters, it’s best to grow Dipladenia as an annual or bring it indoors during the winter months.

How often should I fertilize my Dipladenia?

Fertilize your Dipladenia every two weeks during the growing season with a balanced fertilizer. Stop fertilizing in the fall and winter when the plant goes dormant.

How do I propagate my Dipladenia?

You can propagate your Dipladenia by taking stem cuttings in the spring or summer. Dip the cuttings in rooting hormone and plant them in moist potting soil. Keep them in a warm, humid location until they root and begin to grow.

In conclusion, growing Dipladenia outdoors is a great way to add some color and beauty to your garden or patio area. With proper care and attention, this tropical plant can thrive and produce stunning flowers all season long.