Care of Mandeville & Hibiscuss in Fall/Winter - Knowledgebase Question

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Question by olearys214
September 15, 2005
Is a Mandeville annual or can I bring it in when it get cold (basement) or can it be planted in the ground, cut back and covered with burlap?

I love this plant and don't want it to die when it get cold. I live in Massachusetts.

Also, can Hibiscus plants that are currently in pots be put in the ground, cut back and covered for the winter?

Thank you

Answer from NGA
September 15, 2005
Mandevilla and Hibiscus rosa-sinensis are tropical plants and will not survive your winters outside -- not even with extra protection. But they can be overwintered indoors. You will need to bring them indoors soon, before temperatures drop below 45 degrees. Indoors, the hibiscus will do better if kept in a very sunny window, protected from drafts, and with as much humidity as possible. It may lose some leaves but should stablize. Stop fertilizing for the winter unless you have an extremely bright location for it. The mandevilla can also be kept in a sunny window, but it will tolerate being stored in a cool dark place such as a basement. Keep the soil just barely moist, not bone dry and the temperature about 45 to 50 degrees. Cut it back when you bring it inside as it will defoliate anyway. If you do not have a sunny window for the hibiscus, it too can be stored this way. Prune it back, also, either when you bring it in and/or first thing in the early spring. Next spring, gradually acclimate them to being outdoors, setting them out on sunny warm days and protecting them at night -- do not let them get colder than 50 degrees when they are in active growth. Good luck!

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