Why Is My Mandevilla Plant Dying?

Most people know that mandevilla plants are popular for their beautiful and fragrant flowers. But when the plant starts to die, it can be a very frustrating experience! In this blog post, we will explore why your mandevilla plant may be dying and provide you with some tips to save it.

Why Is My Mandevilla Plant Dying?

Your mandevilla plant is dying because you’re not providing the care that it is accustomed to. The plant is from tropical climates, which means it needs plenty of sunlight and shouldn’t be overwatered.

1) Lack of sunlight

Failure to provide enough sunlight will cause your mandevilla plant to die. The plant needs at least six hours of direct sunlight each day. If you cannot provide this, then the plant should be kept in a location that receives bright light throughout the day and filtered light during part of it or indirect sunlight through a window.

You could also invest in an LED grow light, which is great for providing full-spectrum light when the sun isn’t shining or it is winter in your part of the world.

2) Too much water

Another reason for your mandevilla plant dying is overwatering. If you water the plant every day when it’s only dry in the middle, then there can be too much moisture around its roots and this will cause root rot.

The soil should be dried out before watering again to prevent this from happening! Mandevillas do not like wet feet either, so make sure you never leave standing water in their pot or saucer after each watering session.


How do I bring my mandevilla back to life?

In depends on what caused your mandevilla to die in the first place! You will need to do the opposite of what caused the issue. For example, if your mandevilla is dying from overwatering, then you should stop watering it for a couple of weeks and repot in fresh soil.

If the plant hasn’t received enough sunlight, then move it into a sunnier location during sunny days or invest in an LED grow light that will provide your plants with plenty of beautiful flowers.

What does an overwatered mandevilla look like?

Overwatered mandevillas will have droopy, yellow leaves that are floppy to the touch. The plant should perk back up if you stop watering it for a couple of weeks and allow its soil to dry out before giving it water again.

What does an underwatered mandevilla look like?

Underwatered mandevillas will have yellowish-green leaves that are crispy and stiff to the touch. The plant should perk back up if you start watering it more frequently, but make sure the soil is only moist in the middle before giving it water again!

What does a dehydrated mandevilla look like?

Dehydrated mandevillas will have brown leaf edges or wrinkly leaves that feel papery when touched. If this issue occurs, then increase watering frequency slightly until it’s looking healthy again!

Should I repot my dying mandevilla?

You should repot a dying mandevilla if it has root rot. The rotting roots will need to be removed and the pot should be cleaned… When repotting, use fresh soil that is loamy with high organic matter content.

Additionally, make sure you never overwater your mandevilla once it has been replanted! Mandevillas don’t like wet feet and too much moisture around their roots can cause root rot again quickly if they are left in standing water after a watering session.

Should I fertilize my dying mandevilla?

If you are repotting your mandevilla, it may be a good idea to fertilize the plant after replanting. Fertilizing can help speed up growth and get your dying mandevilla back on track!

Mandevillas need fertilizer that is high in nitrogen during their spring growing season when they are actively growing new shoots. During summer months, the plants should only have about once-a-month feedings with half-strength liquid fertilizer to encourage flowers but prevent excessive leafy growth.

What’s wrong with my mandevilla?

Your mandevilla has root rot if its stems look brown or black at the soil level and there is no green tissue insight. They will also smell rotten when composted.

Root rot occurs when there is too much moisture around the roots and this prevents them from getting the oxygen they need to function properly. This can be caused by overwatering or standing water in a saucer after watering!

What do I do about pests on my mandevilla?

If you see holes in your mandevilla’s leaves, this is likely spider mite damage. Spider mites are tiny little insects that suck the sap out of plant tissue and can be hard to get rid of!

You can get rid of them by using neem oil (Amazon link) on all plants in the area. This will repel the spider mites and get rid of them for good!

What do I do about powdery mildew on my mandevilla?

Powdery mildew is a white substance that covers the leaves, stems, flowers, or fruit of your plant. It can look unsightly but won’t cause any real damage to your mandevilla. You should remove it by gently wiping off all affected areas with water and soap before applying neem oil when you repot your mandevilla in fresh soil!

Why is my mandevilla dropping flowers?

If your mandevilla is dropping its flowers, it could be due to overfertilization. If you are giving the plant too much fertilize or if there’s a high salt content in the soil, then this can have an effect on flowering! You should reduce fertilizer applications until flower production begins again and flush out excess salts by watering more frequently with plenty of water so that all of the soil gets drained from the pot each time.

What do I need to know about transplanting my dying mandevilla?

When repotting your mandevilla, make sure you use fresh organic-rich loamy soil that drains well. There shouldn’t be standing water at any point after watering. You should also avoid any type of fertilizers or salts until new growth begins again.


In conclusion, your mandevilla plant is dying because you’re not providing the care that it is accustomed to. The plant needs plenty of sunlight and shouldn’t be overwatered. Make sure you dry out the soil before watering again and never leave standing water in its pot or saucer after each watering session.

If these tips don’t help, then please contact us for further assistance at any time! We would love to hear from you 🙂

2 thoughts on “Why Is My Mandevilla Plant Dying?”

  1. My Mandeville grows new vines, then dies back. I bought it this spring, and I’m having a hard time keeping it alive. The lower half is living, just new growth that dies back.
    What can I try. It has not flowered yet, but I am hoping next summer.

    • To address the issue of your Mandevilla experiencing new vine growth followed by dieback, ensure it receives adequate sunlight (full sun to partial shade) and water (moist soil with good drainage) while avoiding overwatering. Consider fertilizing with a balanced fertilizer for flowering plants and prune dead or dying vines to encourage new growth. Provide support for climbing, monitor for pests and diseases, and maintain warm temperatures with high humidity if indoors. With patience and proper care, your Mandevilla should recover and potentially bloom next summer.


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