CRESTVIEW — Okaloosa County Master Gardener and author Marie Harrison is the Tri-County Horticulture Study Group's guest speaker this week.

Residents can listen to Harrison's lecture and presentation, meet other gardeners and learn about Malvaceae, the malva or hibiscus family,  10 a.m. Sept. 24 at the Okaloosa Cooperative Extension Service, 3098 Airport Road, Crestview.

Afterward, attendees can visit Bonnie’s Garden (4218 Painter Branch Road, Crestview), see the inventory of tropical hibiscus and learn the ins and outs of growing these tropical plants. In addition, find out how she manages retail sales on Etsy, Amazon and eBay.

The group will have lunch at Wild Olive (797 N. Pearl St., Crestview). RSVP to joycews@cox.net to ensure a seat is available.

The Tri-County Horticulture Study Group is sponsored by several Northwest Florida garden clubs. No dues or memberships are required, and meetings are free and open to the public.

See www.mariesgardenanddesign.com for more information.