You don’t need a greenhouse to grow orchids. Learn the essentials to achieve success on your windowsill, from selecting the right plants to proper lighting, watering, fertilizing, and repotting. Taught by Greenhouse Manager Lynn Ackerman on Saturday, November 10 from 10 – noon at the Lyman Estate Greenhouses, 185 Lyman Street in Waltham.

$20 Historic New England members, $25 nonmembers. Register at www.historicnewengland.org