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Japanese Maple 'Emperor I' (Acer palmatum 'Wolff'): Superior Burgundy Foliage and Late Frost Resistance

Japanese Maple Emperor I

Overview

'Emperor I' is a breakthrough Japanese maple: faster growing than 'Bloodgood', holds spectacular burgundy color all summer in full sun, and turns brilliant fiery red in fall. Its late leaf emergence protects it from late spring frosts that damage other cultivars. Grows 15–20 feet tall and wide.

Significance

Survived a devastating 2007 Kentucky freeze (20–25°F after full leaf-out) that killed other Japanese maples. A game-changer for cold-climate gardeners.

Cultivation

Full sun to part shade; moist, well-drained soil. Low maintenance. From Seneca Gardens, Louisville.

Other: Japanese Maple Post-Transplant Care on Mound; Japanese Maple Seed Collection and Stratification Protocol; Paperbark Maple (Acer griseum): Four-Season Tree with Peeling Cinnamon Bark; Japanese Maple 'Amber Ghost' (Acer palmatum 'Amber Ghost'): Series of Stunning Foliage Colors; Japanese Maple 'Oshu Shidare' (Acer palmatum 'Oshu Shidare'): Pendulous Branches with Red-to-Green Foliage; Threadleaf Japanese Maple (Acer palmatum var. dissectum): Cascading Form with Golden Autumn Color; Japanese Maple 'Olson's Frosted Strawberry' (Acer palmatum 'Olson's Frosted Strawberry'): Strawberry Red Spring Foliage with Pink Veins; Red Maple (Acer rubrum): Native Eastern Tree with Brilliant Red Autumn Color; Three-Flower Maple (Acer triflorum): Peeling Bark and Brilliant Orange-Red Fall Color; Japanese Maple (Acer palmatum): Varieties, Culture, and Landscape Uses

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