How to Harden Off a Passion Flower

Passion flowers are beautiful blooming vines also known as passion vines. They're typically hardy in the U.S. Department of Agriculture plant zones 7 and warmer. If you started your passion flower indoors to transplant it to the garden, or if you overwintered a container passion flower indoors, harden it off before planting or placing it outdoors. This way, your passion flower will slowly become accustomed to the outdoor conditions, causing your plant much less stress. Begin the hardening-off process just after the last expected spring frost date in your climate.

Instructions

1. • 1

     Set the passion flower outside for two to three hours in a shady location. Bring it back indoors to its usual spot afterward.

   • 2

     Leave the plant outdoors two or three more hours the next day in a partially shady location. Then, bring it back in.

   • 3

     Continue to increase the amount of time and amount of sunlight hours each day by one or two hours.

   • 4

     Leave the plant outdoors in a sunny location after approximately six to eight days. Then, in a few days when it's cloudy, transplant it to the garden, if desired.