Seasonal Care for Mandevilla in Zone 7 (Philadelphia)

Overwintering Mandevilla on a Trellis

Randy in Philadelphia (Zone 7) wants to know how to care for two Mandevilla vines on a fence so they return each spring.

Expert Step‑by‑Step

1. When night temps dip into the 40 °F, prune vines back to ~12 inches above the pot.
2. Stop fertilizing; reduce watering slightly.
3. Gradually acclimate: move pot indoors at night, outdoors in dappled shade by day for a week.
4. Keep indoors for winter in a cool, bright spot. Water sparingly, no fertilizer.
5. In spring, harden off by moving outside gradually. Winter growth will die back; new growth will emerge.
6. Resume fertilizing with a bloom‑booster (high phosphorus) at half strength, then full strength once established.