Skip to Content

Why Aren’t My Mandevilla Blooming? (5 Reasons And 5 Solutions)

Sharing is caring!

Have you been waiting for a long time to see your Mandevilla bloom? Are you losing patience and are feeling completely helpless? If that’s the case, don’t worry, because we’re here for you. This article will answer the question ‘why aren’t my Mandevilla bloomingand present you with the much-needed solutions.

Mandevilla is a gorgeous plant. They’re tropical vines with trumpet-shaped flowers. Also known as rock trumpet, this genus of flowering vines has five-petal flowers, which come in the shades of pink, white, and red.

This flower blooms in the summer and sticks by you till the fall season. In warmer areas, the Mandevilla vine blooms all year round!

Mandevilla plants are grown as perennials and are a favorite amongst gardeners. There are many species of this plant, each varying in flower shape and size. But if your Mandevilla isn’t blooming at all, that means there is a problem.

So, why aren’t my Mandevilla blooming?

There can be many reasons, but a generalized answer is that its needs aren’t being fulfilled. It’s on the gardener to identify the problem before applying any solutions. If you’re eager to find out more, keep on reading.

why aren't my Mandevilla blooming
Mandevilla Flowers are basically “All Leaf, no Flower” – via Reddit

Why Aren’t My Mandevilla Blooming?

Merely realizing that there is a problem is the first step to solving it. So just by being here, you’re one step closer to making your Mandevilla bloom. But before applying any solution, you have to identify why aren’t my Mandevilla blooming.

The following is a list of five reasons that might be causing the lack of blooming. Let’s take a look at them!

Not Enough Light

Mandevilla vines require full, bright sun. Although Mandevilla vines can tolerate a partial shade, they produce the best blooms in direct sun exposure.

Sunlight acts as a fuel for the process of photosynthesis. Plants act as solar panels by catching sunlight and using it for necessary life functions. Without sunlight, a plant might end up dying.

If you’re growing your Mandevilla plant in a pot and keeping it away from the sun, you’ll never get to see flowers. Six to eight hours of sunlight is necessary for the growth of flowers on your vines.

Lack of Water

Being a plant that prefers bright sun, Mandevilla tends to dry out quickly. Your plant will dry out and eventually die if the soil isn’t moist. The first signs of lack of watering will be fewer or no blooms on the wines.

Water is another ingredient necessary for the growth of the plant. It plays a significant role in photosynthesis. It provides the plant with the much-needed hydrogen that helps produce food. Without water, the plant won’t even have the energy to stay alive.

Insufficient Fertilizer

If you’re not fertilizing your plant, it won’t bloom. Lack of nutrients in the soil will lower the energy sources in your Mandevilla plant. The three major nutrients that every plant needs are nitrogen (N), phosphorus (P), and potassium (K). Without them, the vines won’t produce any flowers.

Poor Soil Drainage

Mandevilla plants can tolerate any soil type, as long as it’s well-drained. Flooded soil can induce stress on your plant, causing it to stop flower production. Heavy and soggy soil will damage the plant, and you won’t get any gorgeous blooms.

Bloom Time

Mandevilla plants are summer flowering plants. They thrive in warmer temperatures, as they originate from tropical and subtropical regions. These vines don’t bloom in the winter months. That is normal, so don’t worry.

Vines that grow indoors in winter months need supplement lighting to bloom. It’s possible that even after this, your plant remains dormant until spring. This is the cycle of life for a Mandevilla plant.

But if you don’t take care of your Mandevilla plant during its dormant state, it might fail to bloom the next season.

why aren't my Mandevilla blooming 2
What’s wrong with the mandevilla on the left? – via Reddit


Now that you’ve identified the problem, it is probably time that you start applying the appropriate solution. This section will give you ways to prevent a lack of blooming.

Choose the Perfect Spot

Before getting a Mandevilla plant, choose an appropriate spot. The spot must have full sun exposure. And if you’re placing your plant in partial shade, move it every day to let it soak direct sunlight for 6-8 hours.

Fertilize Regularly

Fertilize your Mandevilla plant every two or three weeks. Choose a water-soluble fertilizer with a high phosphorus content. Phosphorus harvests the energy from the sun and converts it into growth.

Mix one tablespoon of fertilizer with a gallon of water, and feed your plant with this mixture. The fertilizer we recommend is Southern Ag Start Root & Bloom Water Soluble Fertilizer. It’s available on Amazon.

Consistent Watering

Check your soil every day. Make sure that the soil is moist at all times and never allow it to dry out. If the surface of the soil dries out, water it immediately.

Choose the Right Soil

Mandevilla thrives in well-drained soil. The perfect soil for your plant will be a mixture of potting soil, peat moss, and builder’s sand.


Mandevilla roots don’t like to be crowded. Choose a pot that is big enough to hold the roots of the plant. And if at any time you feel that the pot is too small, shift the plant to a larger container.


Mandevilla plants are beautiful and easy to care for. If they’re not blooming properly, that means you’re making an error. It can be anything from poor soil drainage to lack of sunlight. These vines also tend to go dormant after the summer is over.

There are many ways to put your Mandevilla plant on the path to blooming. Just by fertilizing and watering it regularly, finding the perfect spot, and choosing the right soil, you can ensure the growth of flowers on your plant. Southern Ag Start Root & Bloom Water Soluble Fertilizer will aid you in the process.

Hopefully, this answers all your queries. If you have any more questions regarding why aren’t my Mandevilla blooming, leave them in the comments down below, and we’ll get right back to you. Have fun gardening!