You give them away:

UNL Horticulure Club gives away plants

This is one of my wife's favorite sources for plants for her patio, she was really disappointed the sale was cancelled. We tried to pick some up but were probably an hour too late getting in line.

The Horticulture Club uses the funds from this annual sale to fund their next year's activities, we'll be making a donation even though we didn't get any plants.