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An abundance of drought-resistant plants awaits plant lovers looking for just the right plant to brighten their lanai, adorn their yards, or dress up their windows. Presented by the Board of Water Supply, the 2025 Annual Unthirsty Plant Sale at Hālawa Xeriscape Garden, at 99-1268 Iwaena Street, on Saturday, August 2, from 9 am to 1 pm, promises to be an unthirsty plant paradise. Admission is free. Park on Iwaena Street and catch a free shuttle to the garden.

Meandering through a three-acre garden, a lush oasis nestled in Hālawa Valley’s Central Park and browsing through the tables and tables of unique plants that can thrive with little water is a fun, educational experience for the entire family. The endless array of reasonably priced plants may be purchased with major credit cards only. No cash or checks.


This family-friendly and admission-free event is focused on xeriscaping, a creative way to reduce outdoor water use through efficient landscaping. Event-goers can expect the following:

  • A variety of xeric plants by local vendors
  • Educational booths
    • American Society of Landscape Architects
    • BWS Rain Barrel Water Catchment
    • Coconut Rhinoceros Beetle Response
    • Da Bug Doctor
    • Department of Environmental Services/Refuse Division
    • Department of Facility Maintenance/Storm Water Quality Division 
    • Hawai‘i Commission on Water Resource Management
    • Hawai‘i Department of Agriculture Plant Quarantine Branch   
    • Hawaiian Earth Recycling  
    • Hawai‘i Department of Health Safe Drinking Water Branch
    • Honolulu Orchid Society
    • O‘ahu Master Gardeners
    • O‘ahu Invasive Species Committee
    • Sierra Club Hawai‘i
    • USDA Natural Resource Conservation Service
  • More to be announced as information becomes available

Xeriscaping is based on seven fundamental principles that serve as guidelines on how to plan, plant, and maintain a garden that takes advantage of natural climate conditions to make efficient use of irrigation. Some of the principles include growing “unthirsty” plants, using mulch, and installing proper irrigation. To learn more about xeriscaping, the Hālawa Xeriscape Garden, or water-saving tips, visit here.

Proceeds from the plant sale help support educational activities at the Halawa Xeriscape Garden. The open house is co-sponsored by the Friends of Halawa Xeriscape Garden, a non-profit community group that supports educational programs related to water conservation in the landscape. The Halawa Xeriscape Garden is located at 99-1268 Iwaena Street, in Halawa Valley’s Central Park industrial area.

For more information call the BWS at 808-748-5315.

Directions to Halawa Xeriscape Garden


Updated: 06/09/25