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When to Move Houseplants Outdoors: Temperature and Acclimation Guide

Safe Temperature Thresholds

Vinca: survives below freezing.
Spider plant & most cacti: tolerate 35–40°F.

But Your Plants Aren't Hardened Off

Indoor-grown plants need gradual exposure. Wait until night temps consistently stay above 45–50°F. Then introduce to outdoors slowly, shielding from direct sun initially.

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