Mandevilla Dormancy - Knowledgebase Question

Landenberg, PA
Avatar for 30572
Question by 30572
September 28, 1998
I've read the answers to questions about weathering over mandevilla vines (Alice Dupont). I would like to know if it's possible to make the plant go into dormancy over the winter thereby eliminating the need to water it and provide light.

Answer from NGA
September 28, 1998
In my experience, it is almost possible. By that I mean the plant can survive in near dormancy for several months. I have kept it outdoors as late in the season as possible, allowing it to slow down to nearly non-growth with nights in the thirties. As the temperatures cool, and growth slows, the plant needs less and less water. Then I began bringing it in at night and setting it back out again when the thermometer hit forty. Then, about Thanksgiving (when days are no longer in the forties) , I cut it off short and set it in a cool (not freezing) dark basement until late January (no watering but the soil barely damper than bone dry) when it finally tried to leaf out. At that point, I brought it back up into a cool sunroom with very bright light and began setting it outside during the day as soon as daytime temperatures were again in the mid forties. It was a lot of work. But it is a beautiful plant.

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