As autumn official officially arrives Monday, the Hall County Master Gardeners plan to mark the event the following weekend with its annual Fall Garden Expo. Patti Lewis, chairwoman of the Fall Garden Expo and a Hall County Master Gardener, explained part of the Expo’s purpose is to educate the public about gardening and all of its facets as well as raise money for the Master Gardeners program. The funds allow the volunteer-certified group to conduct several of its programs such as Gardens on Green and the Redbud Project.