This is a cold-hardy selection that was introduced by Iowa State University. Sunrise is a deciduous shrub that is well-known for its excellent early, frost-hardy spring bloom, so you'll enjoy reliable flower power each year. Sunrise produces flower buds that are able to withstand temperatures of -20 degrees, unlike all other Forsythia varieties. This bright yellow display is unhindered by an occasional late freeze so common in zones 4 through 6. USDA Zone 4 - 7 Exposure Full sun, Part sun Height 5 - 6' Width 5 - 6'