Puali‘i Weed Control

This slideshow requires JavaScript.

TARGET WEEDS: Strawberry guava (Psidium cattleianum), Koster’s curse (Clidemia hirta), corky-stem passion vine (Passiflora suberosa), christmas berry (Schinus terebinthifolius) and many more!

PROJECT: We will be controlling invasive weeds in a shady gulch, within a remnant native dry forest ecosystem.  This area is rich with natives plants, including lonomea, mamaki, and the endangered koʻoloa (Abutilon sandwicense). We will use small hand tools (hand saws and pruners) and will apply a caution-labeled herbicide (Garlon4) to the cut stems of weeds with drip applicator bottles.

HIKING TIME: 2 hours (round trip)

DIFFICULTY: Moderate; some elevation gain.

WHAT TO BRING: Long pants, long sleeve shirt and shoes with good traction. Please review the suggested packing list.

All weeding tools and gloves will be provided.


  • Drive to trailhead (~1 hour)
  • Unload vehicles; safety briefing (~15 minutes)
  • Hike to project site (~1 hour)
  • Weed control (~1.5 hours)
  • Lunch (1/2 hour)
  • More weed control (~1.5 hours)
  • Explore nearby forest (~1/2 hour)
  • Hike back to vehicles (~1 hour)
  • Wash weeding gear (~15 minutes)
  • Load up trucks (~15 minutes)
  • Return drive to OANRP baseyard (~1 hour)
  • Clean up gear; pau (~15 minutes)