Planting display at Caribou Historical Center and Museum, with vintage hand-planting and horse-drawn implements. Open to public 12-4 p.m.; all are welcome.

Farmers' market at Riverside Park, 8:30 a.m.-1 p.m. Vegetables, meat, eggs, baked goods and more. Concession available.

Spring Fling at Presque Isle Community Garden at 37 Birch St., wth Wintergreen Arts Center, 10 a.m.-1 p.m. Creating/installing pickets, garden signs. Free barbecue lunch.