Plant out
Definition 1 of 1
Pro Tip 1/3Gardening Context
Used specifically in gardening or agriculture to describe moving plants to their final growing spot. 
Aunt May likes to plant out her herbs in early summer.
Pro Tip 2/3Outdoor Activity
Implies an outdoor activity, usually not used for indoor plant arrangements. 
It's time to plant out the saplings we raised in these pots.
Pro Tip 3/3Seasonal Reference
Often associated with specific seasons, especially spring, after the last frost. 
Gardeners are eager to plant out after the winter chill.