Here are a just a few. Will add more when possible. Any information left in the comments is appreciated!
Camden Merryspring Annual Plant Sale — May 15-16 – Tough, pretty, and cheap: Plants that give more than they take will once again be on tap at Merryspring Nature Center’s annual plant sale.
Belfast Green Thumb Plant Sale — May 15th, at the Belfast Boathouse (at the harbor end of Commercial Street). A wide array of annuals, perennials, vines, herbs, vegetables will be available and aching to be planted in your garden. Other Gardening related items will also be for sale.
There’s one in Castine this weekend but we have no details.
Freyburg New England Home, Garden & Flower Show — May 14, 15, 16.
Boothbay Maine Botanical Gardens Native Plant Sale — May 22