North America Native Plant

Oahu Wild Coffee

Botanical name: Psychotria hexandra oahuensis var. hosakana

USDA symbol: PSHEH6

Life cycle: perennial

Habit: shrub

Native status: Native to Hawaii  

Oahu Wild Coffee: A Rare Hawaiian Native Worth Protecting If you’re passionate about Hawaiian native plants and conservation gardening, you’ve probably heard whispers about the elusive Oahu wild coffee (Psychotria hexandra oahuensis var. hosakana). This remarkable shrub represents one of Hawaii’s most precious botanical treasures, though finding one for your ...

Rare plant alert!

Region: Conservation status by state

Status: S2TH: Status is uncertain but is somewhere between the following rankings: Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘

Oahu Wild Coffee: A Rare Hawaiian Native Worth Protecting

If you’re passionate about Hawaiian native plants and conservation gardening, you’ve probably heard whispers about the elusive Oahu wild coffee (Psychotria hexandra oahuensis var. hosakana). This remarkable shrub represents one of Hawaii’s most precious botanical treasures, though finding one for your garden might be trickier than spotting a Hawaiian monk seal sunbathing.

What Makes Oahu Wild Coffee Special

This perennial shrub is a true Hawaiian endemic, meaning it exists nowhere else on Earth. As part of the coffee family (though not the kind that’ll give you your morning caffeine fix), Oahu wild coffee typically grows as a multi-stemmed woody plant, usually staying under 13-16 feet tall. Its branches create a lovely, bushy appearance that fits perfectly into Hawaii’s natural landscape.

Where Does It Call Home

As you might guess from its name, this native beauty is found exclusively in Hawaii, with particular ties to Oahu. It’s part of the incredible diversity that makes the Hawaiian Islands a botanical wonderland, having evolved in isolation over millions of years.

The Rarity Reality Check

Here’s where things get serious, folks. Oahu wild coffee carries a Global Conservation Status of S2TH, which puts it in rare territory. This means every individual plant is precious, and this variety faces real conservation challenges. If you’re considering adding one to your garden, you absolutely must source it responsibly from reputable native plant nurseries or conservation programs.

Why Consider Growing Oahu Wild Coffee

Despite the challenges, there are compelling reasons to include this native shrub in appropriate Hawaiian gardens:

  • Supporting conservation efforts by growing rare native species
  • Contributing to Hawaii’s unique ecological heritage
  • Creating habitat for native wildlife (though specific wildlife benefits for this variety aren’t well documented)
  • Maintaining genetic diversity of Hawaiian flora

Growing Conditions and Care

Unfortunately, specific growing information for this particular variety is limited due to its rarity. However, as a Hawaiian native shrub, it likely prefers:

  • Warm, tropical conditions year-round
  • Well-draining soil
  • Protection from strong winds
  • Partial shade to filtered sunlight

Given Hawaii’s tropical climate, this plant would only be suitable for USDA hardiness zones found in Hawaii and similar tropical regions.

The Responsible Gardener’s Approach

If you’re determined to grow Oahu wild coffee, please follow these conservation-minded guidelines:

  • Only purchase from reputable Hawaiian native plant nurseries
  • Verify the plant’s provenance and ensure it’s legally and ethically sourced
  • Consider participating in conservation programs rather than private cultivation
  • Connect with local botanical gardens or conservation organizations
  • Document your plant’s progress to contribute to conservation knowledge

Alternative Native Options

While you’re searching for responsibly sourced Oahu wild coffee, consider other Hawaiian native coffee relatives that might be more readily available, such as other Psychotria species. These alternatives can provide similar ecological benefits while being easier to source sustainably.

The Bottom Line

Oahu wild coffee represents the fascinating and fragile nature of Hawaii’s endemic flora. While it’s not a plant for every gardener due to its rarity and sourcing challenges, those committed to conservation and native Hawaiian gardening might find it a meaningful addition to their landscape. Just remember: with great rarity comes great responsibility. Every plant counts when you’re dealing with species this precious.

If you do manage to grow this remarkable shrub, you’ll be participating in something much bigger than gardening – you’ll be helping preserve a piece of Hawaii’s irreplaceable natural heritage for future generations.

Oahu Wild Coffee

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Rubiales

Family

Rubiaceae Juss. - Madder family

Genus

Psychotria L. - wild coffee

Species

Psychotria hexandra H. Mann - woodland wild coffee

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA