How Do You Care For Mandevilla Splendens?

How Do You Care For Mandevilla Splendens?

Mandevilla Splendens is not difficult to care for and does not requires a lot of maintenance. It thrives in full to partial shade. Find a location for Mandevilla Splendens that receives at least six hours of direct sunlight daily; however, a little afternoon shade is beneficial in warmer areas.

Water Mandevilla regularly and fertilize once a year in spring with a balanced, slow-release fertilizer. Mandevilla Splendens plants thrive in neutral to slightly acidic soil. They may thrive in loam or sandy soil if it drains correctly. Root rot can be caused by poorly draining soil, such as hard clay.

Most blooming plants in pots are like wet but well-drained soil. If the soil becomes too dry, the blossoms may droop and die.

With your finger, check the soil’s wetness. It is time to water if the top 2-4″ (5-10cm) of soil is dry or plants are wilting. Provide nighttime temperatures of 60 to 65 °F and daytime temperatures of 70 °F or higher.

Plant in a combination of peat moss, potting mix, and builder’s sand in equal portions. The following are the factors to consider when caring for Mandevilla Splendens:


Mandevilla Splendens likes full sunlight. They may need some sun in partial shade but are more profusely bloomed in full sunlight, so select a location for Mandevilla Splendens that receives at least six hours of direct sunlight and remove them from shade during the hottest part of the day. Adjust your location based on how much direct sunlight you receive.


Mandevilla Splendens plants do well in loamy to sandy soil that has good drainage. Mandevilla Splendens will suffer in overly wet soil. In the summer, water Mandevilla Splendens only enough to keep the bottom 2-4″ (5-10cm) of soil moist.

Mandevilla Splendens does well in combining peat moss and potting mix in equal parts (1 1/2 parts peat moss, 1 part potting mix). The mixture can be replaced twice a year (spring and fall).


Mandevilla Splendens should be watered when the top 2-4″ (5-10cm) of soil becomes dry. The plant will wilt if the soil is allowed to dry out too much. Using a lot of water is not necessary, just enough to soak the soil.

The leaves may lose their deep green color if overwatered. If Mandevilla Splendens begins to wilt and remains wilted even after watering, check the potting mix and replace it if necessary.


Mandevilla Splendens plants thrive in hot climates and need warm temperatures. The temperature should be an average of 65 °F all of the day and about 60 °F at night for Mandevilla Splendens to bloom profusely. Place the pot of Mandevilla Splendens splendor for best results near a heat source like a wall or window.


Mandevilla Splendens like moist soil, similar to damp peat moss. If the soil is allowed to dry out, the Mandevilla Splendens will wilt and die. The humidity should be about 60-70% throughout the day.

 It is best grown in a high to medium humidity environment. Avoid overwatering, as this could lead to root rot. Low humidity is helpful as it will allow the leaves to dry enough without damaging them.


A balanced, slow-release fertilizer applied once a year in spring is sufficient for Mandevilla Splendens, but sometimes fertilizer is needed more frequently (especially if you treat your plants with an insecticidal soap).

At least twice a year (spring and summer), fertilize your Mandevilla Splendens with a slow-release fertilizer. Plants prefer to be fertilized in spring. Follow label directions for proper application dosages and frequency of application.


Mandevilla Splendens plants can be propagated through seeds, but for the best results, use leaf cuttings during the spring and summer. Use a sterile knife or clippers to snip off a 1″ – 2″ (2.5-5cm) stem from the lower end of the Mandevilla Splendens flower.

Use this stem as a cutting to root. Cuttings should be taken in spring and fall when foliage is not flowering and put on top of moist paper towels or newspaper in a warm room with bright indirect light. Keep media moist but not drenched with water. Keep soil evenly moist for up to two weeks before rooting may occur.


Mandevilla Splendens may be repotted into larger pots after 1 or 2 years of growth during the spring. Remove Mandevilla Splendens from the pot and gently shake off excess soil. If roots are circling the root ball, carefully untangle them before repotting.

Place the plant into a pot with drainage holes that is one size larger and make a small hole in the center of the potting medium to encourage new root growth. Keep your Mandevilla Splendens in a warm location that receives bright indirect light and maintains moist but not soggy soil.


Mandevilla Splendens need to be pruned once a year during the spring and summer. This annual pruning is necessary for Mandevilla Splendens plants to maintain a healthy growth rate and shape.

Remove dead or damaged stems from the Mandevilla Splendens. New growth will emerge from the top of your plant during the spring, with new stems growing from the old flower stems. Remove these new stems to help direct energy towards old flowering stems.

Pests and Diseases:

Mandevilla Splendens plants are susceptible to spider mites, aphids, scales, and thrips. Aphids feed on Mandevilla Splendens by sucking the sap out of the foliage, which may cause leaf curling. Use insecticidal soap to control any aphid populations within your Mandevilla Splendens plants.

Spider Mites feed on Mandevilla Splendens by sucking the sap out of the plant’s leaves and can be controlled using insecticidal soap. Scale insects are tiny insects that adhere to the stems, leaves, buds, or fruits of your Mandevilla Splendens, obstructing water flow within your plants.

How Do You Prune A Mandevilla Splendens?

Mandevilla Splendens need to be pruned once a year during spring or summer. To prune Mandevilla Splendens, remove old stems and dead leaves from both the mother vine and daughter plants and any crossed or dead branches.

Pruning is best done right after flowering so that new growth has time to develop before winter sets in. When pruning, cut stems back to 6-inch (15cm) lengths. This will encourage new growth, which will produce new flowers in spring.

When pruning a Mandevilla Splendens plant, make sure to remove the old flower stems and all of the old flower leaves as soon as possible. The older your Mandevilla Splendens plant is, the more difficult it is to prune them correctly.

By cutting away at least one-third of the blossoms before they finish blooming, you can greatly improve flowering success with your new plants.

Remove any crossing stems from your Mandevilla Splendens. A crossing stem results from two or more flowers growing from the same mother plant. Crosses will no longer occur when removed, and the remaining plants will seem to blossom better in future years. Here are the steps to follow when pruning Mandevilla Splendens:

  • Prune all stems back to 6-inch (15cm) lengths, cutting any dead or damaged stems and removing all old flower stems as well.
  • Remove leaves from the old crossing stems and any leaves that have been hit with a virus infection.
  • Remove all crosses from your Mandevilla Splendens plants by snipping each of the crossed stems at the point where it branches off from its mother vine.
  • Clean up debris and throw out dead plant parts to avoid attracting pests or diseases to your Mandevilla Splendens plants.
  • Use your pruners to remove any suckers from the base of your Mandevilla Splendens plants if they are present. Suckers are stems that sprout from the base of your Mandevilla Splendens, and they produce tender leaves but no flowers. Suckers can take away nutrients and energy that are meant to be going toward the flowering stems of your Mandevilla Splendens.
  • Pruning old flowering stems will help you maintain your Mandevilla Splendens’ shape.
  • Use pruning shears to prune away any crossing stems, suckers, and leaves at the base of your Mandevilla Splendens plants. This will help your Mandevilla Splendens grow into a better-formed plant.
  • Remember that your Mandevilla Splendens plants need to be kept well watered after they have flowered. Be sure to water and feed them regularly throughout the hot summer season when their growth is most active to produce many new flowers for next spring’s blooms.
  • Remove and discard any leaves or pruning from Mandevilla Splendens that are diseased or damaged. Any diseased leaves or parts of the plant may spread disease to other plants. If your Mandevilla Splendens plants have the disease, remove them as quickly as possible so that your healthy garden is not negatively affected.
  • Remove any dead or damaged plant parts and cut back any dying foliage at the base of your plants.
  • Remove all signs of pests and diseases to prevent them from spreading to other parts of your garden during summer.
  • Prune away suckers at the base if they are present, as suckers take energy away from developing blossoms. Your Mandevilla Splendens will flower better when you prune away suckers in the spring after the bloom has finished for that year’s growth cycle.
  • Trim back the top of your Mandevilla Splendens to just 2-3 branches to maintain its shape.
  • Water your Mandevilla Splendens plants regularly throughout the hot summer season when their growth is active to new blossoms for next spring’s blooms.
  • Remove and discard any diseased or damaged leaves or pruning from your Mandevilla Splendens. You do not want to attract any pests or diseases to your healthy plants.
  • Pruning is important for the healthy growth and flowering of your Mandevilla Splendens plants. Don’t wait too long before you prune your Mandevilla Splendens in the spring or summer, as it may affect how they flower next year and the following.
  • Remove all signs of pests and diseases from your Mandevilla Splendens plants to avoid attracting more pests to your healthy garden between blooming seasons.


Similar Posts