House Grounds Gardens Great Tree Main Greenhouse 1914 - 1929 Hibiscus House 1929 Five parallel glasshouses, designed by Lowell and Sargent, are attached by a single large glasshouse designed by the Olmsted Brothers. The large central glasshouse was called the “Hibiscus House” and among its extensive collections still contains orginal Coe-owned hibiscus plants. Today, seasonal displays of flowering annuals and perennials are showcased throughout the year. For more information checkout: Planning Your Visit.