Native Plants

Koko

Chamaesyce atrococca

USDA symbol: CHAT2

perennial shrub

Hawaii: native

If you’re passionate about native Hawaiian plants and conservation gardening, you’ve probably heard whispers about koko (Chamaesyce atrococca). This remarkable little shrub represents both the beauty and fragility of Hawaii’s endemic flora, making it a plant that deserves our attention and respect. Koko is a perennial shrub that’s as Hawaiian ...

Koko may be listed as rare in your area.
Global Conservation Status

Status: S2 | Imperiled: Extremely rare. Typically 6 to 20 occurrences or 1,000 to 3,000 remaining individuals.

Koko: A Rare Hawaiian Native Worth Preserving in Your Garden

If you’re passionate about native Hawaiian plants and conservation gardening, you’ve probably heard whispers about koko (Chamaesyce atrococca). This remarkable little shrub represents both the beauty and fragility of Hawaii’s endemic flora, making it a plant that deserves our attention and respect.

What Makes Koko Special?

Koko is a perennial shrub that’s as Hawaiian as it gets – it’s found nowhere else on Earth except across the Hawaiian Islands. This multi-stemmed woody plant typically stays under 13-16 feet tall, though it’s usually much smaller in garden settings. With its distinctive branching pattern and succulent-like appearance, koko brings a uniquely Hawaiian character to any landscape.

Where You’ll Find Koko in the Wild

This endemic beauty calls Hawaii home, growing naturally across several of the Hawaiian Islands. However, here’s where things get serious: koko is considered imperiled, with a conservation status of S2. This means there are likely only 6-20 known occurrences in the wild, with perhaps 1,000-3,000 individual plants remaining in their natural habitat.

  • Species observed
  • No observations

Should You Plant Koko in Your Garden?

The short answer is: yes, but only if you can source it responsibly. Because of its rarity status, it’s crucial that any koko in cultivation comes from legitimate nurseries or conservation programs – never from wild collection. If you can find responsibly propagated plants, growing koko is actually an act of conservation.

Growing Conditions and Care

The good news is that koko isn’t particularly fussy once you understand its preferences:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soil is essential – this plant doesn’t like wet feet
  • Water: Drought tolerant once established, but appreciate occasional watering during dry spells
  • Climate: Thrives in USDA zones 10-12, making it perfect for Hawaiian and similar tropical climates

Perfect for Hawaiian Native Gardens

Koko shines in xerophytic gardens and native Hawaiian landscapes. Its compact size and attractive form make it excellent for:

  • Rock gardens and dry slopes
  • Coastal landscapes (it handles salt spray well)
  • Native plant restoration projects
  • Educational gardens showcasing Hawaiian flora

Caring for Your Koko

Once established, koko is refreshingly low-maintenance. Water sparingly – overwatering is more likely to harm this plant than drought. Protect young plants from strong winds, and avoid fertilizing heavily, as native Hawaiian plants are adapted to nutrient-poor volcanic soils.

Supporting Pollinators and Wildlife

While small, koko’s flowers attract native Hawaiian insects, contributing to local pollinator networks. Every koko plant in cultivation helps maintain genetic diversity and serves as a backup population for this imperiled species.

A Plant Worth Protecting

Growing koko isn’t just about adding another interesting plant to your garden – it’s about participating in conservation. By choosing to grow this rare Hawaiian native (when sourced responsibly), you’re helping ensure that future generations will be able to experience this unique piece of Hawaii’s natural heritage.

Remember, with great plants comes great responsibility. If you’re lucky enough to grow koko, consider yourself a steward of Hawaiian biodiversity. And who knows? Your garden might just become a safe haven for one of Hawaii’s most precious native treasures.

Chamaesyce atrococca is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Chamaesyce atrococca is also known as:

Chamaesyce atrococca Croizat & var. kilaueana & | USDA symbol: CHATK
Chamaesyce atrococca Croizat & var. kokeeana & | USDA symbol: CHATK2
Euphorbia atrococca | USDA symbol: EUAT2
Euphorbia atrococca Heller var. kilaueana | USDA symbol: EUATK
Euphorbia atrococca Heller var. kokeeana | USDA symbol: EUATK2
Euphorbia atrococca Heller var. typica | USDA symbol: EUATT
Euphorbia celastroides var. pseudoniuensis & | USDA symbol: EUCEP
Euphorbia multiformis ex & var. mohihiensis | USDA symbol: EUMUM3

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Rosidae
Order: Euphorbiales
Family: Euphorbiaceae Juss. - Spurge family
Genus: Chamaesyce Gray - sandmat

Species: Chamaesyce atrococca (A. Heller) Croizat & O. Deg. - koko

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