The Q&A Archives: Winterizing Tango Twirl Mandevilla

Question: I have a Tango Twirl Mandevilla. I have had other Mandevilla Vines but none like this. It only started blooming at the end of the season. I would like to preserve it over the winter but don't know if it is possible. It is in a pot outside, but here in Wisconsin it gets far too cold to keep the plant outside. What should I do with this particular plant to keep it going during the winter. Right now out nights are getting cold and I don't want to keep it out there too long for fear it will die. The one flower that has finally bloomed is beautiful and there are now, a few more coming. Please let me know what I can do to keep it healthy during the winter. Thank you.

Answer: Mandevilla is a tender plant that survives outdoors only in the mildest climates. Since yours is in a container, you need only to bring it indoors when your weather begins to cool down. The best place to keep it indoors is in a sunny window. Mandevilla can be pruned down to about 3' without harm, but wait until it has acclimated to growing indoors before pruning it back. Begin now to help it become adjusted to living indoors by taking it inside during the night and taking it back outdoors during the day. Do this for about a week, leaving it inside for longer and longer periods of time. Wait a few weeks and then prune it down to a manageable size if necessary. Mandevilla can grow to 12' as a vine, but it can be kept at about 3' with constant pinching and pruning. Since you'll be wintering your plant over each year, you'll probably want to keep it small. Under the right conditions of heat and light your Mandevilla will bloom indoors for you. Enjoy!

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