Flowers

Complete Guide to Mandevilla: How to Grow & Care for Mandevilla Plants

Read our complete guide to Mandevilla Plants for everything you will ever need to know! Tips for planting, growing and caring for the Mandevilla Plant.
Pinterest LinkedIn Tumblr

The Mandevilla has many varieties, and all of these vining tropical flowers are showy and gorgeous. The Mandevilla vine, also known as the rock-trumpet, is gaining in popularity, and you can find them in stock at most garden centers throughout the United States.

The vigorous growth of the Mandevilla makes it an excellent addition to any summertime garden. Use the Mandevilla vine to bring some color to your gazebo, patio, or over doorways. The Mandevilla is a hardy plant, and it survives winter conditions without any hassle.

About Mandevilla Plants

The Mandevilla vine got its moniker from the late Henry Joseph Mandeville, a British diplomat, and avid gardener. Gardeners will instantly recognize the Mandevilla vine by its brilliant, trumpet-shaped flowers, oval leaves with a glossy texture, and its enthusiasm for climbing.

Mandevilla vines enhance the visual of arches, pergolas, and they do well as potted plants trellised on the patio. This plant loves to climb, and it will reach the top of any trellis or pergola with ease.

Mandevilla is a low-maintenance plant during the height of the growing season. The Mandevilla bursts into bloom in the springtime, lasting through to the fall. This plant is an ideal companion for other large planters, or in flowerbeds.

One of the best features of the Mandevilla is that it attracts hummingbirds to the garden. Relax on your patio on a hot summer afternoon, and watch the hummingbirds sip away at the flower’s nectar.

Red & White Mandevilla Starter Plants, From Amazon

Tips and Requirements for Growing Mandevilla

Mandevilla loves growing in tropical climates, with plenty of sunlight, rain, and well-draining soil. Select the right planting location in your garden and prepare the soil before planting.

Sunlight Requirements

Mandevilla flowers are a true show-stopper. The beautiful shape and eye-pleasing color of the flowers complement the foliage of the plant. To ensure that your Mandevilla bloom to full potential, make sure you plant them in an area of the garden that receives plenty of indirect sunlight throughout the day.

While it’s more than possible to grow Mandevilla in the full sunshine, they seem to do better when they have a bit of shade to cool off under on a hot day. Gardeners should note that if they don’t give the Mandevilla the sun it needs, then they can expect the plant to flower poorly during the growing season.

Planting your Mandevilla in an area of the garden that receives morning sun, but has some shelter during the peak midday sun hours, helps to enhance growth and flowering in your Mandevilla. Gardeners must also ensure they tie down the Mandevilla to prevent strong winds from shifting and damaging the plant.

Yellow Mandevilla Live Plant, From Amazon

Watering and Drainage

The Mandevilla enjoys having its soil moist throughout the day. However, gardeners should allow the soil to dry out between watering sessions. The gardener can provide a slow trickle watering system that slowly releases water into the soil to ensure accurate moisture levels at all times.

The gardener must ensure the soil in the planting sport has adequate drainage.

  • Mandeville doesn’t enjoy getting their roots wet in soggy soil, and it may result in the development of root rot that damages or kills the plant. When watering, spray down the leaves of the plant to remove any dust or debris on the leaves.
  • Mandevilla requires well-drained soil that’s rich in nutrients like nitrogen and calcium. One of the most important parts of planting your Mandevilla is providing the right potting mix or substrate for the plants.
  • Mandevilla likes loose and loamy soil that drains well and holds the right balance of nutrients to help the plant grow. Using a compost potting mix for Mandevilla growing in containers or pots provides the plant with a good base.

However, gardeners should place a layer of gravel at the bottom of the pot to improve soil drainage. Mixing some perlite into the soil mix helps with water retention.

Feed Your Mandevilla at the Right Time

When buying your Mandevilla at a garden center or nursery, the plant will likely have slow-releasing fertilizer mixed into the soil. The nutrients in the soil should last your Mandevilla a few months, but after it runs out, the gardener will need to add some more fertilizer to keep the plant growing.

Gardeners must ensure that they don’t add any additional fertilizer to the plant for at least 3 to 4-months after planting. The addition of fertilizer on top of the nutrients already in the soil results in burning the root system.

After the Mandevilla reaches 6 to 12-months old, the gardener can fertilize cautiously, using a slow-release fertilizer product diluted with plenty of water. Alternately, providing the plant with a top dressing of organic compost may give the plant the nutrition it needs to grow and flower.

Bougainvillea Fertilizer, Perfect for Mandevilla

What Are the Common Pests Affecting Mandevilla plants?

Some of the more common pests affecting Mandevilla are the following.

  • Aphids
  • Scale
  • Mealybugs
  • Red spider mites
  • Whiteflies

Ants bring aphids to plants that are weak or diseased. If you find aphids and ants crawling on your Mandevilla, blast them away with a strong jet of water from the hose. Alternatively, the gardener may apply an organic pesticide that kills the bugs.

For further protection of the plant, the gardener can spray it down with a light solution of Neem oil. Most pests find neem oil either toxic or repulsive, keeping your plants free from pests and disease.

Gardeners may also notice the presence of mealybugs collecting under the leaves of the Mandevilla. Mealybugs typically attack plants that aren’t getting enough water. Low humidity levels or a lack of watering in the summer may cause them to appear on your plants.

White Mandevilla
White Mandevilla

If the gardener notices the appearance of webbing on the plant, it’s a classic sign of spider mite infestation. Spider mites appear when climate conditions get too hot for the Mandevilla to handle. These pests are incredibly persistent, and gardeners will need to use an organic pesticide or neem oil solution to get rid of the bugs on their plants.

Gardeners should inspect their plants two to three times a week for signs of pests, and ensure that they check the plant thoroughly before the start of the winter season.

Overwintering Your Mandevilla

Mandevilla is a very hardy plant, and they can easily survive outside in the wintertime, in many U.S. states. As the winter season approaches, gardeners should check their Mandevilla for signs of pest, larvae, or eggs.

The gardener can then prune the plant, removing infested or diseased portions of the plant that might spread. If there is severe pest damage, then the gardener can treat the plant by spraying it with neem oil to kill the bugs.

Neem oil is a natural pesticide treatment that’s effective at killing the following pests affecting your Mandevilla.

  • Powdery mildew
  • Plant scale
  • Mealybug colonies
  • Aphids and thrip
  • Spider Mite

Neem oil is safe to use, but it’s toxic if ingested, so keep it away from the reach of small children.

Mandevilla plants also have to deal with any forms of disease that show up during the growing season. It’s common for these diseases to cause the foliage to drop off of the plant, reduce flowering, and turn the foliage yellow.

In most cases, the growth of fungi is a sign that conditions are too humid or moist. The plat may also have a lack of ventilation at the planting site, resulting in the onset of powdery mildew. Gardeners must ensure that the soil dries out between waterings to prevent the onset of disease in the plant.

Prune the foliage to improve air circulation around the plant, and don’t worry if some leaves turn yellow and fall off of the Mandevilla, it’s a normal part of the growing cycle. It’s only when the plant experiences a sudden turn in the health of its foliage that there could be a possible problem related to care or pests affecting the plant.

cultivating Dipladenia (Mandevilla) in greenhouse
cultivating Dipladenia (Mandevilla) in greenhouse

Do Deer Eat Mandevilla Plants?

The Mandevilla plant has no official guidelines online, stating whether the plant is resistant to deer feeding on it during the summer. However, according to anecdotal reports, some species of Mandevilla display deer-resistant characteristics, while others don’t.

It’s important to note that the Rutgers University New Jersey Agricultural Experiment Station deer resistant database, has no mention of Mandevilla being deer-resistant.

Growing Your Mandevilla All Year

The Mandevilla is a frost-tender perennial, even though most gardeners think of it as an annual plant. After the wintertime temperatures drop below 50 F, gardeners need to bring the Mandevilla indoors for the season.

Gardeners must ensure they check the plant for pests before bringing it indoors. The gardener can then cut the plant back to a third of its size, and place it in an area of your home that receives indirect sunlight during the day.

Only water the Mandevilla when the soil feels dry to the touch. As the springtime appears, and temperatures rise consistently above the 50F mark, gardeners can clean up the plant by removing any dead foliage, and then return it to the garden for the summer.

7,471 views
Hollie Carter

Hollie is a life-long gardener, having started helping her Dad work on their yard when she was just 5. Since then she has gone on to develop a passion for growing vegetables & fruit in her garden. She has an affinity with nature and loves to share her knowledge gained over a lifetime with readers online. Hollie has written for a number of publications and is now the resident garden blogger here at GardenBeast. Contact her at hollie@gardenbeast.com or follow on twitter https://twitter.com/greenholliec

9 Comments

  1. This was very helpful compared to the last site l was looking at! Thank you!

    • Our Mandevilla was doing great and flowering pink flowers. All of a sudden the leaves are turning yellow with some black and dark green spots and falling off. Is it diseased or am I watering too much? It’s about 3.5 ft tall and we’ve had it a couple of months in same sunny spot.

  2. I have several mandeviila plants purchased directly from an Encinitas grower. One of them, growing in a pot has multiple blooms but the blooms have gotten very small. Any ideas about the cause/remedy for this?

    • I guess I’m confused. If it hardy anywhere in US why does it need to be taken inside when temp is below 50F? Can it be wrapped in a blanket or insulating wrap and left outside over the winder in zone 7b?

  3. My Mandeville plant is dropping leaves, the leaves develop a dark brown blotch in the center of the leaf then the blotch expands and spreads over the leaf resulting in the leaf dying. Any suggestion/reply would help,thanks

  4. Hi I live in Perth Western Australia which is a Mediterranean climate but can you tell me how long Mandevilla live for as well as Mandevilla Touramaline. I have them in large pots all around my white picket fence and they are stunning with flowers all year round but obviously not so much during winter. I have just repotted them into larger pots as I have no garden as such because it’s all brick paved and artificial grass ie all for low maintenance purposes.
    Thank you and I will await your response

  5. Carol M Nelson Reply

    I live in zone 6a so I’ve brought my mandevilla inside. It is in a 12″ pot and continues to flower and is now even shooting out long vines. I plan to move it back outside into the ground in the spring. I would like to pinch it back to encourage bushyness but I don’t want to pinch off bud stems. Where do i start?

Write A Comment