How to Start Seeds for Your Garden Indoors
By: Julie Day
Step 8: Harden Seedlings for Outdoors
Before planting outdoors, harden seedlings off first to acclimatize them to the change in air and light. Hardening takes from 10 days to 2 weeks. Place seedlings outside in the shade for a few hours each day, increasing the time every day until they remain outside all day. Never leave plants out in freezing weather.