Mandevilla Flower Temperature. 02072021 Temperatures should be at least 60 degrees Fahrenheit during the day and 50 degrees Fahrenheit at night for mandevilla to be planted outside. The Mandevilla vine are not at all cold sturdy and can not tolerate temperatures lower than about 45 degrees Fahrenheit for an extended duration.
The ones I have in full sun have a few more flowers than the full shade ones but the ones in full shade still have a lot of flowers. The average temperature should be. After the wintertime temperatures drop below 50 F gardeners need to bring the Mandevilla indoors for the season.
I have some in full sun and some that are in almost full-shade.
Tropical vines with their big leaves and oversized flowers are almost irresistible to gardeners who love bold color. The plant will probably show the first flowers at the end of June. Nighttime temperatures should remain around 65 to 70 F. Once temperatures go below 50 degrees F.