The Land & Garden Preserve greenhouse complex, McAlpin Farm, was once a part of the McAlpin Estate, Villa Rockwood. It was purchased by John D. Rockefeller Jr. in 1937, when the estate was dismantled and sold in parcels. This began the tradition of growing plants for the Rockefeller summer estate, The Eyrie. Cut flowers for arrangements, vegetables, and herbs were grown in small greenhouses and outdoors in a one-acre farm field. Since the 1960s, many Rockefeller family households, summering on or near Mount Desert Island, have used the plants grown at McAlpin Farm.
In early 2000, Architect Roc Caivano and Peggy Rockefeller designed a larger glass greenhouse complex. Constructed by Rough Brothers, this also allowed the summer flowers to be grown for the Thuya Garden borders. A lath house was built to grow rhododendron shrubs propagated from historic plants at the Asticou Azalea Garden.
In 2018, this property was bequeathed by David Rockefeller to the Land & Garden Preserve, allowing the tradition of growing annuals and perennials for the gardens to continue today. A team of 4 staff (who also welcome volunteers!) grows roughly 11,000 plants annually.
In addition, shrubs, trees and ground covers are also being grown for the Asticou Azalea Garden, the meadows and lands around Little Long Pond, and woodland garden areas at Thuya Garden and the Abby Aldrich Rockefeller Garden.
Partnerships have organically arisen with Acadia National Park and The Bar Harbor Food Pantry. At McAlpin Farm, plants are grown to be used in Acadia from seeds collected in the Park. Greenhouse tomatoes, green beans, and herbs are grown and harvested weekly for the Food Pantry from July to October.