Q.Wintering White Dipladenia In Calif Central Valley
Thank you
GKH_Susan
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on November 13, 2019
Since your hardiness zone 9b can get below freezing in winter you will need to bring your plant indoors or overwinter in a greenhouse. You do not need to fertilize during the winter. Here are more tips:
https://www.gardeningknowhow.com/ornamental/vines/mandevilla/growing-a-dipladenia.htm
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