2382 Pine Mountain Road, Kennesaw. Smith-Gilbert Gardens depends on volunteers to care for the garden, lead school tours and greet visitors. The facility includes more than 3,000 species of plants on 16 acres. The gardens are open 9 a.m.-4 p.m. Tuesdays through Saturdays. For information about the facility, please go to www.smithgilbertgardens.com. For more information about volunteer opportunities, contact the facility’s visitor services coordinator, Anna Bell King, at info@smithgilbertgardens.com.