Join volunteers on the beautiful Marginal Way to pick seed pods of highly invasive Black swallowwort. Your efforts will help save native plants and protect Monarch butterflies. No experiences needed. Everyone works in teams led by experienced pod pickers who will show you how to identify swallowwort. It is critical to collect the seed pods before they open in September and the seed parachutes float on the wind spreading into new areas. Spectacular scenery and a rewarding experience.