THURSDAY, APRIL 18:

  • Tour Herring Gut Learning Center, in Port Clyde. See the recirculating aquaponics system for aquatic plants and animals. Warren Field and Garden Club invites everyone to the free tour. Meet at 10 a.m. at Second Congregational Church, 252 Main Street in Warren, for carpooling; bring lunch. FMI: 594-4113.
  • Talk on Keeping Rodents Out of Older Homes, 7 p.m. at Watts Hall, Thomaston. Jesse Richards of Coastal Exterminating Services on the dangers of infestations – and how to fix or prevent them. Historic Thomaston Research Group hosts the public talk.

SATURDAY, APRIL 20:

  • Earth Day Workday at MOFGA’s Common Ground Education Center, in Unity, 9 a.m. to 3 p.m. Maine Organic Farmers and Gardeners Association invites volunteers to prepare garden beds, plant trees, spread chips or turn compost. You’ll get an organic lunch (you can volunteer to help prepare it) and a MOFGA Volunteer T-shirt. RSVP: mofga.VolunteerHub.com.
  • “New Pests and Crop Diseases in Maine,” 4 p.m., Arrowsic Town Hall, Route 127. Caleb Goosen, MOFGA’s organic crop and conservation specialist, will describe new pests and plant diseases related to climate change in Maine. Free.

MONDAY, APRIL 22:

  • Tractor Safety Course in Knox, five Mondays, starting April 22, 5 to 7 p.m. at Ingraham’s Equipment. $20 includes a manual. Sign up at extension.umaine.edu.

TUESDAY, APRIL 23:

  • Talk on Common Poisonous Garden Plants, noon, Merryspring Nature Center, Camden. Denise DeSpirito will introduce foxglove, castor, datura and other plants that are toxic to humans, but that add beauty and attract pollinators. DeSpirito is the garden manager at Merryspring. $5; free for members.

THURSDAY, APRIL 25:

  • Talk on Growing Strawberries and Raspberries, at First Congregational Church, 55 Elm Street, Camden. Camden Garden Club invites everyone to sip coffee and tea at 9 a.m. followed by the 9:30 a.m. program with expert David T. Handley, who will cover the variety of plants available. how to select the best planting site and how to prepare the soil to ensure a bountiful crop.

COMING UP:

  • Solar Open House in Brooks, at the Albee residence, 35 Moosehead Trail Highway, on Saturday, April 27. With a 9 a.m. talk about systems for emergency backup, maximizing self-supply, demand charge reduction, and battery and storage flexibility. Bring your electric bill. RSVP: 589-4171, JAlbee@ReVisionEnergy.com.
  • MOFGA’s Annual Spring Growth Conference, Saturday, April 27, 10 a.m. to 3 p.m. at Maine Organic Farmers and Gardeners Association Common Ground Education Center in Unity. Two panels and a roundtable workshop will look at hiring and managing farm labor. $30 ($20 for MOFGA members and certified organic growers) includes lunch: mofga.org.
  • Chainsaw Safety Course, at Hidden Valley Nature Center, Jefferson, Saturday and Sunday, April 27 and 28. Designed for newbies and those who want a refresher course to stay sharp and safe. $130 Midcoast Conservancy members; $150 nonmembers. Also at Hidden Valley, Timber Frame Course, Thursday to Sunday, May 2 to 5. Eight students will build a simple timber frame and learn the basics of sustainable forestry and sawmill operation. $450 for Midcoast Conservancy and MOFGA members; $500 for everybody else. Details are at MidcoastConservancy.org.