Rainbow eucalyptus has a streaked, multicolored trunk. Our recommendation is to choose a stop that already fits your island day, confirm access, and allow time for the whole garden visit. A roadside glimpse is not a reason to stop in traffic or enter private land.

Access checked September 27, 2026: DLNR’s Keʻanae Arboretum listing is closed under the Nolo closure. Do not visit until an official reopening. Kauaʻi’s limited reopening notice does not establish access to Keahua Arboretum. Check HawaiiGuide travel alerts and the land manager before planning either stop.

Eucalyptus deglupta is native to the Philippines, Indonesia and New Guinea and was introduced to Hawaii. It is not a native Hawaiian tree. Singapore's National Parks Board describes the outer bark shedding unevenly, revealing green new bark that darkens over time to blue, purple, orange and maroon tones. Because patches of different ages sit side by side, one trunk shows several colors at once. Treat published photos as examples rather than a promise of the colors you will see. See the NParks species page and the Kew Plants of the World Online entry.

Keʻanae Arboretum belongs in a Road to Hāna plan only after reopening. The state’s historical trail sheet places the entrance on Highway 360, 0.7 mile past mile marker 16. It describes a paved approach and labeled trees, with no facilities. That sheet explains the site, not today’s access. Check the current official trail listing; the Nolo closure notice says reopening follows damage assessments.

Plan a restroom stop elsewhere. Use only legal, signed parking; if none is available, skip the stop. Follow the Road to Hāna Code of Conduct: park in designated stalls and avoid sites on private property or without visitor-welcoming signs. Do not stop in the traffic lane to take a tree photo.

A paid garden option is the Garden of Eden Arboretum at 10600 Hāna Highway near mile marker 10.5. The operator lists hours of 8am to 4pm and $20 admission for ages 16 and up. Its garden map shows central parking and restrooms, selected nearly level paths and an uphill return; it also warns of falling branches, especially in wind. If rainbow eucalyptus is your only reason to pay, ask staff to confirm a viewable specimen and a suitable route before buying admission. Check the operator’s latest notices before traveling.

Keep Keahua off your active itinerary until DLNR confirms access. Its September 19 notice says most DLNR lands on Kauaʻi remain closed; the limited river and park reopenings listed there do not confirm this arboretum is open.

For future planning, Keahua Arboretum is at the end of Kuamoʻo Road in the Līhuʻe-Kōloa Forest Reserve, inland from Wailua. Older directions describe a stream ford. The DLNR bridge announcement and the bridge builder’s account document replacement of that flood-prone crossing with a bridge. A bridge is not an all-clear: obey barriers, never drive or walk through floodwater, and stay within signed access. Use the DLNR Kauaʻi trail page for planning checks. For general trail preparation once access is confirmed, DLNR’s hiking-safety brochure recommends learning the route, wearing hiking boots for traction and carrying mosquito repellent. Save your route information before leaving town.

The Hawaii Tropical Botanical Garden is about 7 miles north of downtown Hilo on the Old Mamalahoa scenic road. Adult admission is $35, and the operator recommends 90 minutes to two hours. The entry boardwalk drops roughly 100 feet over 500 feet, and guests must navigate it independently. Wheelchairs, walkers, scooters and crutches are not permitted; canes and walking sticks are; strollers must be unoccupied on the boardwalk. Full details are on the plan-your-visit page. If the tree is your only objective, confirm a viewable specimen with the garden before buying admission. Plan a wider garden visit. The operator recommends arriving on Old Mamalahoa Road, the scenic route; use our scenic-drive guide to plan the approach. Check the operator's latest notices, since posted hours do not prove a weather closure has ended. Our recommendation is to photograph trees from a garden’s permitted paths. Respect posted access restrictions and private-property boundaries rather than improvising a roadside photo stop.

On Oahu, start with Foster Botanical Garden at 180 North Vineyard Boulevard in downtown Honolulu. The official page lists hours of 9am to 4pm with last entry at 3:30pm, and admission of $5 for adults and $3 for Hawaii residents. The city-linked virtual tour explicitly includes rainbow eucalyptus. Use that virtual tour to identify the tree. Its visitor guidance recommends walking shoes and prohibits handling plants or gathering plant material. Visitors staying in Waikiki do not need to change islands to see this tree.

These are suggestions to try, not guarantees. Compare the trunk in shade or overcast light against direct sun, since each changes how the colors separate. Focus on the trunk and adjust exposure until the bark detail holds. Take a wide shot for context, then a close frame of the bark texture from the permitted path. Keep colors faithful in editing. Leave the tree as you find it: our photo approach involves no misting, peeling or rearranging plants. Follow DLNR’s stay-on-the-trail guidance rather than entering planted areas. At Garden of Eden, heed its map’s warning not to stand beneath tall trees, especially on windy days. If you plan commercial photography, ask the garden about permits in advance.

Choose the nearest suitable stop already on your day. Check official access the morning you go, allow for admission and the full garden visit, and confirm a viewable tree and a walking route you are comfortable with before paying. For Oʻahu, our first choice is the Foster visit described above. Keʻanae can fit a Road to Hāna day after the official closure ends; Keahua also needs confirmed access before it goes back on an itinerary. Use My Trip to organize your chosen destination alongside the rest of your island plans.