'Summer Chocolate' Mimosa (Albizia julibrissin 'Summer Chocolate'): Purple-Foliaged Sensation

'Summer Chocolate' Mimosa is a revolutionary cultivar that transforms the classic mimosa with deep, chocolate-purple, fern-like foliage—a stunning contrast to its pink, powder-puff flowers. Developed by Japanese breeder Yokoi and introduced in 2000 (PP13822), Albizia julibrissin 'Summer Chocolate' adds sophisticated color to the summer landscape.

Foliage and Flower Contrast

The bipinnately compound leaves emerge green but quickly mature to a rich, deep burgundy-chocolate purple that holds well through summer heat. The leaflets are small and numerous, creating a fine, feathery texture. In mid to late summer, the tree produces the classic mimosa flowers—fragrant, pink, silky pom-poms that glow against the dark foliage. The effect is dramatic and refined.

Taxonomic Classification

Growth and Considerations

'Summer Chocolate' grows 20-30 feet tall with a broad, umbrella-like canopy. It prefers full sun and well-drained soil, tolerating heat and drought once established. It's hardy to zone 7 (0-10°F). The purple color is most intense in full sun; in shade, leaves revert to greener tones.

Important caveats: Like the species, it can be invasive in some regions (particularly the Southeast) due to prolific seeding. The wood is brittle, prone to storm damage. It's relatively short-lived (15-25 years). Check local invasive species lists before planting. Where appropriate, it's a spectacular specimen tree, especially when backlit by sun. The seed pods persist into winter.