Dipladenia has a limited tolerance for cold and must be grown as an outdoor perennial in USDA zones 10 and 11 where there is no danger of frost. Nevertheless, despite the sweltering heat of summer, this tropical flowering vine never misses a beat and continues to put on a show with its huge, eye-catching blossoms. Growers in regions with milder winters may cultivate it as an annual, bring it inside for the winter, or shield it from the elements while it is still planted in the garden, provided that the temperatures do not go too high.
Characteristics and Description
The vine has been reclassified as a species of Mandevilla, despite the fact that many people continue to refer to it as Dipladenia. Mandevilla boliviensis, also known as white Dipladenia, and Mandevilla sanderi, more usually referred to as plain Mandevilla, are the two most prominent kinds of Mandevilla. However, there are several cultivars of Mandevilla, each with distinctively coloured blooms and unique patterns of growth. The University of Florida states that the red blooming ‘Red Velvet’ may reach heights of 20 feet in only one season, which is much higher than the usual height of plants, which ranges anywhere from 3 to 10 feet. Compact cultivars like as ‘Burgundy’ are ideal for growing in hanging baskets or pots because of their small size.
All kinds of Dipladenia have woody stems that are covered with oblong, glossy, dark green leaves that are around 4 inches long and may wrap over buildings. The huge flowers, which have the appearance of a funnel and measure 4 inches in diameter, are highly spectacular and begin to bloom in the summer. The hues of the flowers range from different shades of pink to white, scarlet, and burgundy, depending on the species, and they are known to attract hummingbirds and butterflies. Dipladenia is a plant that is native to the northern areas of South America and Central America. It is a genuine lover of heat and, when planted in circumstances that are optimal for it, produces powerful growth and profuse blooms.
Dipladenia Temperature Tolerance
Do not be concerned about the temperature tolerance of a Dipladenia; even if your region has unusually high temperatures during the summer months, the plant will be able to withstand the heat and will continue to produce its beautiful blossoms. Even though, once established, plants have a modest tolerance for drought conditions, it is still important to water them on a consistent basis in order to maintain healthy development. This is true whether the plant is growing directly in the ground or in a container. Growing conditions that are rich in nutrients, have good drainage, and are maintained consistently wet by irrigation are ideal for dipladenia.
On the other side, Dipladenia has a poor frost tolerance, which means that it is easily injured or even killed by temperatures that are frosty or cold. Old Man Winter is the culprit behind this. When temperatures drop to below 50 degrees Fahrenheit for a lengthy period of time, Costa Farms says that all kinds of Dipladenia need some form of winter protection. If you reside in an area that has the odd day with temperatures that range just below 50 degrees Fahrenheit, it is possible that your plant will not sustain any harm from the cold. However, prolonged exposure to low temperatures may cause harm to the woody stems of the plant or even cause the top section of the plant to perish. Even though the upper portion of the plant perishes, the root system may still be alive and will re-sprout once the warmer weather of spring comes.
Tips for Winter Protection
Whether you are cultivating your Dipladenia in the ground or in a container, there are a few different ways to safeguard it throughout the winter months that lie ahead. This will ensure that your plant lives through the harsh weather. The University of Illinois Extension suggests that if your Dipladenia is growing in the garden, you should dig up the plant when temperatures start to drop to around 60 degrees Fahrenheit. Then, you should replant it in a container that is large enough to contain the root system, and you should make sure that the container has bottom drainage. Before taking your Dipladenia inside, prune it by cutting it back to a length of around 8 to 10 inches; water it well; and position it in an area of your home that is warm and has strong lighting. When the top few inches of the soil are completely dry, water the plants.
If your Dipladenia grows outside, whether in the garden or in a container, and your location rarely receives frosty weather – for example, in warmer sections of USDA zone 9 – you can protect the plant on cooler nights to prevent damage to the plant. If your Dipladenia grows inside, you should bring it inside during frosty weather. You should give the plant plenty of water before the onset of the cold weather, as this will help to insulate the roots. Additionally, if you have a number of outside pots, you could arrange them together to help keep things warm. In addition to that, you may mulch the space around the plant, drape a sheet over it, and hang Christmas lights over it to assist generate warmth.
During the winter, reduce the amount of watering you do and stop fertilising your plant. If your plant seems to have suffered frost damage, wait until the weather warms up in the spring to do any trimming on your Dipladenia. Once the weather warms up and the temperature stays at 60 degrees Fahrenheit or higher, bring indoor plants back outdoors.