Gwinnett Technical College's Environmental Horticulture program is hosting its 17th annual community plant sale April 20 and 21.

The free event is from 9 a.m. to 4 p.m. in the campus greenhouse facility. On opening day, the college and Gwinnett County Public Library  also will present a slate of gardening experts and authors from 10 a.m. to noon.

Plants for sale include summer flowers, perennials, herbs, vegetables, tropicals and shrubs. The greenhouse is adjacent to Building 600 on the Gwinnett Tech campus at 5150 Sugarloaf Parkway in Lawrenceville.