The most important factor to encourage mandevilla blooming is sunlight. Provide at least 6 hours of full sun per day to boost flower production. Next, make sure to avoid overwatering. Despite the fact that they are tropical plants, mandevillas typically only need to be watered once per week. In order to encourage additional flowers, plant mandevillas in a mixture of potting soil and builder’s sand. Finally, mandevillas bloom at different times based on your growing region. In warm climates, a mandevilla may bloom all year. In a colder region, you may only get mandevilla flowers during summer.
4 Tips to Get Your Mandevilla Plant to Bloom
Mandevillas are lovely vines that are surprisingly easy to care for, but you may discover that yours haven’t developed many flowers. The good news is that there are a few tricks you can try if your mandevillas are not blooming. Follow these four tips to enjoy beautiful, blooming mandevilla plants:
Provide Adequate Sunlight
Increase mandevilla blooms by offering 6 hours of sun per day. Mandevillas are shade tolerant vines, but without 6 hours of sunlight daily, they may produce few or no flowers. Sometimes, the more sunlight they receive, the more flowers they will produce.
- Provide 6 hours of sunlight for your mandevilla plants each day.
- Check out our guide to mandevilla sun and shade needs.
- Move mandevillas from full shade to a partially sunny area of your garden.
In hot climates, mandevillas should have afternoon protection from the sun. Even 6 hours of indirect light will ensure that your vines bloom, but direct sun is better. If they are planted in a shady area of your garden, consider moving them to where they will receive 6 hours of light each day.
Refrain from overwatering your mandevillas, as this is a common reason they fail to bloom adequately. Mandevillas need moist, well-drained soil. Our mandevilla watering guide can help you troubleshoot any watering issues you have.
- Don’t overwater your mandevillas if you want a significant number of flowers.
- Prevent the soil where your mandevillas are planted from becoming soggy.
- Cut back on watering if your vines are planted in an area where the ground drains slowly.
- Allow the ground to dry out between waterings.
You should never allow the soil around your mandevillas to become or remain soggy. If your vines are planted in an area where the soil drains slowly, cut back on watering to accommodate this situation, and make sure the soil dries out between waterings.
Treat or Change the Soil to Improve Flowering
Change the soil or add supplements to ensure it maintains a neutral pH. Mandevillas are a bit fussy regarding their soil. They do not like overly rich soil, but will also languish if the soil is depleted of nutrients.
- The perfect soil mix ensures your mandevillas will flower more profusely.
- Change the soil to ensure it maintains a neutral pH.
- Try a mixture of one-third builder’s sand and two-thirds potting soil for the best results.
Because poor soil can reduce flowering, consider changing the soil to a mixture of two-thirds potting soil and one-third builder’s sand. This usually creates the perfect balance needed for healthy blooms, and many of them!
Understanding Mandevilla Bloom Time
It’s essential to have a thorough understanding of when and how mandevillas bloom. In certain instances, your vines may be doing just fine, but a lack of knowledge about the blooming season may have you a bit confused. In cool climates, mandevillas bloom primarily in the heart of summer.
- In cool climates, the blooming season for mandevillas is the heart of summer.
- In tropical climates, your mandevillas should bloom year-round.
Therefore, if blooms are fewer and further between in spring and fall, simply regard this as perfectly normal. In tropical climates, your mandevillas should bloom in cycles throughout the year. If this is not the case and you know that temperatures are consistently warm, then it’s time to implement some of the tips outlined above.
How Often Does a Mandevilla Bloom?
How often a mandevilla blooms depends on the region in which it is grown. In four-season areas and semi-tropical regions, mandevillas typically bloom at the beginning of summer and die off at the first frost. In tropical climates, they bloom in cycles throughout the year. In climates where they bloom year-round, there are usually newer blooms and older ones on your vines at the same time.
- In four-season areas or semi-tropical regions, mandevillas bloom 1–3 times per year.
- In tropical regions, mandevillas bloom year-round.
Mandevillas may go through two or three flowering cycles in a 12-month period. In four-season climates, they usually bloom once in the early summer, and occasionally a second time before the weather turns cold. This depends on the average temperature, and factors such as whether or not heat waves have occurred.
Why Do Mandevilla Plants Not Bloom?
Mandevilla plants fail to bloom for a variety of reasons. The most common are lack of sunlight, too much watering, and inappropriate soil pH. Fortunately, all these problems have remedies, provided you make sure you are correct about what is causing your vines not to bloom.
- Overwatering may stop mandevillas from blooming.
- Lack of sunlight can reduce mandevilla blooms.
- Inappropriate soil quality can reduce the number of flowers your mandevillas produce.
You may have to troubleshoot by checking the soil quality, evaluating how much sunlight your plants are receiving, and ensuring that you are not overwatering your plants.
How Do You Get a Mandevilla Plant to Bloom?
The most effective ways to get a mandevilla to bloom are:
- Make sure your mandevilla plants get 6 hours of sun on a daily basis.
- Water mandevillas infrequently and allow the soil to dry out between waterings.
- Reduce watering frequency if the soil does not drain well.
- Change the soil to a mixture of potting soil and builder’s clay for better results.
- Familiarize yourself with the normal blooming time for mandevillas in your area.
With plenty of direct sunlight, well-draining soil, and a bit of care, your mandevillas will begin blooming soon. Just remain patient and provide your mandevilla with the basics—it will start to flower once temperatures are right.