How to grow dipladenia (mandevilla) in hot weather

Among the many species grown in gardens and on balconies, few cope with intense heat while retaining their vigour. In areas with long summers, keeping pots full of flowers and green foliage can become an ongoing challenge. In these conditions, dipladenia, also called mandevilla, is an option that brings together resilience, striking decorative appeal and comparatively straightforward care.

What is dipladenia and why does it tolerate so much heat?

Dipladenia is a vigorous, semi-woody plant that can be trained as a climber or kept compact in containers. Its glossy, evergreen leaves provide a deep-green backdrop for white, pink or red flowers, which appear for several months in warm climates.

Suited to sunny settings, it generally thrives in places with long, bright summers, provided the soil is not waterlogged. This is why it has become popular on flat balconies, façades and roof terraces, where it withstands heat better than many ornamental plants.

Watch a video on Carol Alencar’s channel explaining how to grow dipladenia:

How to grow dipladenia for abundant flowering

To encourage plentiful blooms, choose the container or flowerbed carefully and prepare the growing medium properly. Pots with generous drainage holes and a layer of drainage material prevent water from collecting, while mixes containing sand and organic matter make the soil lighter and more aerated around the roots.

A few essential measures keep the plant healthy while promoting new shoots and flower buds throughout the growing season:

• Use a light, free-draining growing medium rich in organic matter.
• Water at intervals, allowing the surface layer to dry out between waterings.
• Place it somewhere that receives plenty of direct sunshine for most of the day.
• Protect it from severe cold and frost, particularly when containers are exposed.
• Feed it in spring and summer with fertiliser for flowering plants.

Fertiliser may be applied fortnightly or monthly, according to the instructions for the chosen product. In balanced soil, the plant develops thick roots that store water and nutrients, reducing the need for very frequent watering and improving its tolerance of periods of extreme heat.

What care does dipladenia need in summer and winter?

During summer, dipladenia can cope with full sun, although in regions where temperatures exceed 38–40 °C it may benefit from light shade during the hottest hours. Shade netting or positioning it near walls can shield the foliage from scorching without cutting the light levels too greatly.

In winter, the key concern is protection from very low temperatures and frost. In colder areas, containers are often moved indoors to bright locations or placed in simple greenhouses; watering and feeding should also be reduced during this slower-growth period.

Why is dipladenia widely used in gardens, balconies and façades?

Dipladenia has become a frequent choice for residential and commercial schemes because it combines a bold visual effect with low maintenance needs. In compact spaces, it can be trained up spiral supports or arches, while in homes with larger courtyards it covers pergolas and fences in a flowering green display for much of the year.

Another useful point is that, after the cold weather, light pruning tends to make the plant regrow more strongly and spread its flowers more evenly along the stems. With simple planning for watering, feeding and protection from severe cold, it can therefore keep gardens, balconies and façades looking neat and colourful for almost the entire year.