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Flora · United States

Haleakala Silversword

A once-in-a-lifetime bloom: Haleakalā's silver rosette plants spend decades growing before erupting in a single dramatic flower spike and dying.

When
Jan — Dec, peak Jun — Aug
Best viewing
A high-elevation hike through volcanic cinder desert dotted with shimmering silver rosettes; blooming plants appear sporadically throughout summer months and reward patient, altitude-ready visitors.
Category
Flora
Status
In season

About this spectacle

High on the volcanic slopes of Haleakalā, at elevations above 2,100 meters, the Haleakalā silversword stands as one of the most striking plants on Earth. Each individual grows for decades as a tight, silvery rosette of sword-like leaves that shimmer and reflect light, appearing almost metallic against the barren, rust-red cinder desert. After years of patient growth — sometimes half a century — a single spectacular bloom stalk erupts from the center, rising up to two meters with hundreds of maroon and yellow composite flower heads. The plant then sets seed and dies, making every encounter feel rare and precious. Visitors walk among rosettes at all stages of life on the crater rim trails, with the volcanic moonscape as backdrop, the air thin and clear, and sweeping views of Maui's coast far below. The sight of silverswords catching the morning light against Haleakalā's stark terrain is genuinely otherworldly.

When to go

Jan — Dec, peak Jun — Aug

Getting there

Nearest airport: OGG. Nearest city: Kahului.

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