Unity, rain or shine. Plant 102 heirloom apples and hundreds of companion plants. Volunteers will be on hand to teach planting. No charge – Everyone welcome! Bring your own lunch. If possible, please bring shovels, rakes and wheel barrows! If you are attending, please RSVP by emailing Anna Libby (alibby@mofga.org) or by calling the MOFGA office (207) 568-4142.

Saturday, 9 a.m. to 3 p.m., MOFGA’s Common Ground Education Center, Unity. Celebrate Earth Day with MOFGA by preparing our grounds for the upcoming growing season. Volunteers get lunch and a free T-shirt. FMI: alibby@mofga.org or (207) 568-4142.

10 a.m. to 4 p.m., Common Ground Education Center Unity. Instructor: Michael Phillips, author of The Apple Grower. Fee is $40 for members, $50 for non-members. Details.

Sunday, 10 a.m. to 4 p.m., Beech Hill Farm at College of the Atlantic. Instructor: Michael Phillips, author of The Apple Grower. Fee is $40 for members, $50 for non-members. Details.

6:30 p.m. Evening class on soil fertility, compost, crop rotation, green manures, pest control. MSAD 15 Adult & Communication Education, New Gloucester High School Cafeteria, 10 Libby Hill Road. Information: 207-657-2620; www.MSAD15.org. Class details

Wednesday, 10 a.m. to 3 p.m., MOFGA Kitchen at Common Ground Education Center, Unity, Maine. Cost: $30, including lunch (and recipes to take home). Details and registration.

6 p.m., Unitarian Universalist Church, Miller St., Belfast. Join MOFGA's El Salvador Sistering Committee for its annual Empty Bowl Supper fundraiser. For just $15 ($35 maximum for families; tickets at the door), attendees enjoy delicious soups, breads and desserts, get to see friends, and take home a beautiful bowl, handcrafted and donated by a Maine potter.

Speaker Annie Kassler of Bat Conservation will show slides and video. Potluck: Please bring a plate, silverware and a dish to share. MOFGA library, Unity. 6:00 p.m.

Sunday, 8:30 a.m. to 4 p.m., $50/members, $60/non-members. Details and registration.