The not hardy Dipladenia, also called Mandevilla, does not tolerate frost at all. The tropical plant should be brought to a suitable winter quarters in good time in autumn. Even temperatures just above freezing can damage the Dipladenia considerably.
If the Dipladenia is not brought into the warmth in time before the onset of winter, it can usually no longer be saved
Can I still save my Dipladenia?
If your Dipladenia has only been too cold for a short time, you can start a rescue attempt. However, this does not necessarily have to be successful, because the Dipladenia is very sensitive to cold. Bring the Dipladenia to a warmer place, for example a conservatory, and cut back the plant.
If some of the cut shoots are obviously undamaged, then use them as cuttings and grow new plants from them. Presumably, these young plants even have better chances of surviving than the old plant.
How do I overwinter my Dipladenia successfully?
Since the Dipladenia can already be damaged at temperatures below 8 °C, bring this plant to its winter quarters at the end of September or beginning of October. For example, a heated greenhouse or a bright conservatory with temperatures between 9 °C and 15 °C is suitable. If you overwinter the Dipladenia in a dark cellar, it will almost certainly not bloom next summer.
The Dipladenia should be bright and neither too warm nor too cold in winter so that you can continue to enjoy the beautiful funnel-shaped flowers next season. This makes the Mandevilla not an easy winter guest. For this reason, only the particularly beautiful or high-priced specimens are often overwintered.
The essentials in brief:
- not hardy
- very sensitive to cold
- damaged even at temperatures just above 0 °C
- hibernate at 8/9 °C to 15 °C
- be sure to spend the winter brightly
- slowly get used to the sun and outside temperatures in spring
tips
If your Dipladenia has obviously been damaged by the cold, then a rescue attempt promises little success. Learn from the damage and act early next fall.