Why Are My Mandevilla Leaves Turning Brown And Dying?

Why Are My Mandevilla Leaves Turning Brown And Dying?

The most common reason you will see yellow Mandevilla leaves turning brown and dying is that your plant is exposed to too much sun.

To maintain the correct amount of sunlight your Mandevilla needs, you should keep it in a location that doesn’t have full sun all day long and cover it with shade cloths or something else that will block out the sunlight from reaching it during the hottest part of the day.

You can also try moving your Mandevilla to an area with more shade and a cooler temperature. If you don’t protect your Mandevilla from too much sun, it may cause its leaves to scorch, killing them or damaging their ability to live longer. The following are the reason why Yellow Mandevilla leaves are turning brown and dying:


The common reason why Mandevilla leaves will turn brown and die is because they receive too much water. You should only give your plant enough water to make the soil moist, not wet. If the soil is wet enough, the plant can’t absorb all of the nutrients that it needs, which can cause leaf scorch or poor plant growth.

Excess sunlight:

The main reason Mandevilla leaves turn brown is that they are exposed to too much sunlight during the hottest part of the day. You can prevent your yellow Mandevilla from getting burned by blocking out as much sunlight from reaching it as possible. The best way to do this is by surrounding it with shrubbery or another location that is full of other plants.

Excess fertilizers:

Another common reason your leaves are turning brown and dying is that you give your plant too much fertilizer. Mandevilla needs very little fertilizer each year, but it will do better if you don’t fertilize it at all.

If you continue to fertilize your plant, it will cause the leaves to weaken and drop off, which is something that most Mandevilla growers do not want to happen.

Lack of sunlight:

The leaves are turning brown and dying because your plant lacks the sunlight it needs. The best location for Mandevilla is in a place that receives 4 to 6 hours of sunlight daily. If your Mandevilla doesn’t receive enough sunlight each day, the leaves may droop or turn yellow, causing them to die.

If you have tried all of these solutions and are still having trouble getting rid of your brown dead leaves, you should take a cutting from another plant and root it so you can start growing a new one in its place.

Lack of nutrients:

The reason why your Mandevilla is turning brown and dying is that it is not getting enough nutrients. You should feed your plant a balanced fertilizer every two weeks during the growing season. Even if you have given it too much fertilizer, you can use a soil conditioner to amend the soil before you plant any new Mandevilla seedlings so that they will be ready for planting by next spring.

Lack of drainage:

Your Mandevilla leaves are turning brown and dying because it is planted in soil that doesn’t have enough drainage. It needs a location with sandy soil that has good drainage so the roots can access oxygen.

If the soil doesn’t have any drainage, it will hold too much moisture near the plant roots and prevent the roots from getting enough air they need.

If you live in a humid area with high rainfall, you should use coconut coir as a substitute for potting soil because it has great water retention properties without causing your plants to rot or get moldy.

Lack of ventilation:

The reason why Mandevilla leaves are turning brown and dying is that it is not receiving enough oxygen. The perfect location for growing Mandevilla is near a door or window with good ventilation. The plant will receive plenty of fresh air, and the roots can stay cool.

Do not use plastic pots if you want to grow Mandevilla because they don’t provide enough air circulation around the roots of the plant, causing it to rot and die.

Instead, use clay pots or other types of pots that have holes in them to allow air to circulate, which will help keep them healthy by allowing them to grow and absorb the nutrients it needs.


Another reason why your Mandevilla is turning brown and dying is that it has not been watered enough or watered with insufficient water. The soil should be moist all of the time.

If you are watering your plant too much, the roots will become stressed and rot, or they will swell up with water and prevent air from getting to the leaves, causing them to die. Underwatering can also cause root rot by lowering the oxygen levels in the soil so much that it becomes anoxic.

Pests and diseases:

The reason why your Mandevilla’s leaves are turning brown and dying has to do with a pest or disease. The most common pests of Mandevilla are aphids, mealybugs, and scale insects.

Mealybugs are easily spotted on the leaves because they have a white sticky substance on them that look like cotton candy. If you see any strange-looking insects on your plant, you should use a leaf dip to get rid of them.  Mealybugs also cause severe damage to the plant, causing it to wither and die.

How Do You Prune Yellow Mandevilla?

Yellow Mandevilla must be pruned once a year during the spring and summer. Take a pair of sharp pruning shears and cut off all of the dead leaves, stems, and branches. You can also prune your Mandevilla to keep it short, and in the shape you like.

When pruning your Mandevilla, only about one-third of the plant should be removed. If you prune too much off of it, it will not have enough energy to grow and bloom again next year.

If you are planning on moving your Mandevilla, you should start this process in the fall and finish it by the following spring before its last growing season.

To help prepare it for a new location, take a shovel and dig up all of the roots so that they can be prepared to make their new home in your flowerbed or garden.

You will also want to spray any pests with a good insecticide, so they don’t move into your new location along with your plant.

You should also take any leaves off of the plant, but you don’t have to cut them. The following are the steps to follow when pruning Yellow Mandevilla:

  • Remove all the dead flowers from the plant.
  • Remove any dead or damaged branches from the plant, including spindly ones growing in the center, and cut them to about 3 inches on a branch that is growing upright.
  • Make sure to remove all of these leaves, stems, and branches from your garden, so you don’t end up with weeds in your flowerbeds.
  • Replace all of the soil around your Yellow Mandevilla so there are no bare spots left behind where you removed dead leaves, stems, or branches from your plant earlier. Make sure to water it well when you have finished replanting it in its new location.
  • Take the pruning shears and cut off about one-third of the plant stems if you are trying to keep them shorter.
  • Finally, take a leaf dip and spray your Yellow Mandevilla every month during summer to keep it healthy and prevent insect infestations.

Where Can I Find Yellow Mandevilla?

You can find Yellow Mandevilla at nurseries, specialty greenhouses, and online gardening stores that sell tropical plants. These stores should be able to tell you where your plant comes from, the cost it will take to purchase a cutting of it, and the best way to plant it in your garden.

Yellow Mandevilla is a tropical plant, so you should only be able to find it during the late spring and summer months when it is in season. If you are looking for it during the winter or fall, check to see if any nurseries and greenhouses have it in stock for sale because they might be able to provide you with one.

When buying Yellow Mandevilla, you should make sure that you choose a healthy plant by looking at the leaves and stems. Make sure the leaves do not have signs of brown or yellow spots in them and that they are not droopy or wilting.

The stems should also be free of any signs of fungus or black spots and of broken branches or parts that have been completely detached from the plant.

When also buying Yellow Mandevilla, consider the ideal condition of growing your plant in and the ideal conditions of the plant itself.

Make sure it is in a pot with holes in it to allow plenty of air circulation to reach the roots and make sure that you water your plant with a good fertilizer every month.

All Mandevilla shrubs can be sold at nurseries and specialty greenhouses during the late spring and summer months because they are perennial plants that grow during this time of the year.

They will begin to wither and die if they are not taken care of properly once autumn comes, but many people will continue to care for them until it’s time for them to be sold again next season.

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