Bougainvillea thrive in Hardiness Zone 9 and up. In areas where temperatures fall below 30° F. bougainvillea are treated as annuals, and brought indoors to winter-over. Visit our Bougainvillea 101 page for tips on how to “winter-over” your bougainvillea.
The information below was kindly provided by The National Arbor Day Foundation.
Look up hardiness zones in your area. Enter your zip code in the form below, and we’ll tell you where you fall in the Arborday.org Hardiness Zones Database.
What are Hardiness Zones?
The Plant Hardiness Zones divide the United States and Canada into 11 areas based on a 10 degree Fahrenheit difference in the average annual minimum temperature. (The United States falls within Zones 2 through 10). For example, the lowest average temperature in Zone 2 is -50 to -40 degrees Fahrenheit, while the minimum average temperature in zone 10 is +30 to +40 degrees Fahrenheit.
Suggested hardiness zones have been indicated for all trees and perennials available online from the Arbor Day Foundation. If a range of zones, for example, zones 4-9, is indicated, the tree or perennial is known to be hardy in zones 4, 5, 6, 7, 8, and 9.
Suitable hardiness means a plant can be expected to grow in the zone’s temperature extremes, as determined by the lowest average annual temperature. Keep in mind that local variations such as moisture, soil, winds, and other conditions might affect the viability of individual plants.
Hardiness Zone Search,