Gardening Articles: Landscaping :: Trees, Shrubs, & Vines
Winter's Hollies (page 2 of 5)
by Michael MacCaskey
Winter's Hollies Selection Guide
Most hollies are evergreen, and most are hardy to about 0°F (USDA zone 7). Deciduous hollies are hardier, generally to about -20°F (zone 5). Although temperature limits are a useful guide, other factors, such as summer temperatures and rainfall patterns, also influence adaptability. Therefore, all the evergreen varieties listed here are noted as either "N" northern, including the Plains and midwestern states east of the Rocky Mountains; "S" southern, including the Gulf Coast and upper South; or "W" western, including the Pacific Northwest and West Coast.
All hollies are dioecious, meaning that male and female flowers are born on separate plants: The berry-producing flower is on the female plant and the pollen-bearing male flower is on another. Only females produce the colorful berries and to do so require pollen from a male plant of the same species. Hybrids are pollinated by males of either parent species. Those few female hollies that produce some berries without pollen from a male plant are noted in the descriptions. Birds feast on all holly berries but prefer red ones over other colors.