Rainbow Eucalyptus: The Mindanao Gum with Living Art Bark

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• Family:	Myrtaceae (mir-TAY-see-ee) (Info)
  Genus:	Eucalyptus (yoo-kuh-LIP-tus) (Info)
  Species:	deglupta (de-GLUP-tuh) (Info)

Overview

Few trees capture the imagination quite like the Rainbow Eucalyptus (Eucalyptus deglupta), also called the Mindanao Gum or Rainbow Bark. Native to the tropical rainforests of the Philippines (Mindanao), Indonesia, and Papua New Guinea, this fast-growing broadleaf evergreen is celebrated worldwide for its spectacular, multicolored trunk—a living canvas painted by nature.

The Living Art of Exfoliating Bark

The tree's fame rests on its bark. Smooth and orange-tinted when young, the outer bark peels away in irregular strips throughout the year, revealing a fresh, bright green inner bark. As this new layer ages, it cycles through a stunning palette: blue, purple, maroon, orange, and finally back to brown before shedding again. Because different zones shed at different times, the trunk displays a kaleidoscopic patchwork of colors simultaneously, making every tree—and every viewing angle—unique.

Growth & Form

In its native habitat, E. deglupta can soar to 200+ feet (60+ m), though in cultivation (e.g., Hawaii, Southern Florida, coastal Southern California) it typically reaches 60–100 feet. It develops a straight, cylindrical trunk with a relatively narrow crown of lance-shaped, aromatic leaves. Small white flowers appear in clusters, followed by woody capsules.

Cultivation Requirements

This is a strictly tropical to subtropical species (USDA Zones 10–11). It demands year-round warmth, high humidity, and abundant rainfall (or irrigation). It thrives in deep, fertile, well-drained soils and full sun. It is not frost-tolerant; even a light freeze can cause severe damage or death. In suitable climates, it grows with astonishing speed—several feet per year—making it a dramatic, fast-acting specimen for large tropical gardens, parks, and botanical collections.

Uses & Significance

Beyond its ornamental supremacy, the wood is used for pulp, paper, and general construction in its native range. It is the only Eucalyptus species native to the Northern Hemisphere. For gardeners in frost-free zones, it offers an unparalleled year-round visual spectacle.