North America Native Plant

Kauai Schiedea

Botanical name: Schiedea kauaiensis

USDA symbol: SCKA4

Life cycle: perennial

Habit: subshrub

Native status: Native to Hawaii  

Kauai Schiedea: A Critically Endangered Hawaiian Treasure Worth Protecting If you’re passionate about native Hawaiian plants and conservation, you may have heard whispers about the elusive Kauai schiedea (Schiedea kauaiensis). This remarkable little shrub represents one of Hawaii’s most precious botanical gems – and unfortunately, one of its most endangered. ...

Rare plant alert!

Region: United States

Status: S1: Status is uncertain but is somewhere between the following rankings: Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ Endangered: In danger of extinction throughout all or a significant portion of its range. ⚘

Region: United States

Kauai Schiedea: A Critically Endangered Hawaiian Treasure Worth Protecting

If you’re passionate about native Hawaiian plants and conservation, you may have heard whispers about the elusive Kauai schiedea (Schiedea kauaiensis). This remarkable little shrub represents one of Hawaii’s most precious botanical gems – and unfortunately, one of its most endangered.

What Makes Kauai Schiedea Special?

Kauai schiedea is a perennial shrub that’s perfectly sized for intimate garden spaces. This low-growing beauty typically stays under 1.5 feet tall and never exceeds 3 feet at maturity, making it an ideal candidate for native plant enthusiasts with limited space. Its delicate white flowers and compact growth habit give it an understated elegance that’s quintessentially Hawaiian.

Where Does It Call Home?

This endemic species is found exclusively on the island of Kauai, where it originally thrived in dry to mesic forests and shrublands. Unfortunately, its natural habitat has been severely reduced over time.

A Critical Conservation Concern

Here’s what every gardener needs to know: Kauai schiedea carries a Global Conservation Status of S1, meaning it’s critically imperiled. With typically 5 or fewer occurrences and fewer than 1,000 remaining individuals in the wild, this species is also listed as Endangered.

What does this mean for gardeners? If you’re considering growing Kauai schiedea, it’s absolutely essential that you source it only through legitimate conservation programs or botanical institutions. Never collect from wild populations – doing so could push this species closer to extinction.

Growing Conditions and Care

For those lucky enough to obtain responsibly sourced plants, Kauai schiedea thrives in USDA hardiness zones 10-11. Here are the key growing requirements:

  • Sunlight: Partial shade to full sun
  • Soil: Well-draining soils that mimic its native habitat
  • Water: Drought-tolerant once established, prefers dry to moderate moisture
  • Climate: Tropical to subtropical conditions

Perfect for Specialized Gardens

Kauai schiedea isn’t your typical backyard shrub – it’s a conversation starter and a conservation statement. This plant works beautifully in:

  • Native Hawaiian plant collections
  • Conservation-focused gardens
  • Educational botanical displays
  • Specialized endemic plant gardens

Supporting Hawaiian Ecosystems

While specific pollinator relationships aren’t well-documented, like many native Hawaiian plants, Kauai schiedea likely plays a role in supporting native insects and the broader island ecosystem. Every individual plant grown helps maintain genetic diversity for potential future conservation efforts.

The Bottom Line for Gardeners

Should you grow Kauai schiedea? Only if you can source it responsibly through legitimate conservation channels. This isn’t a plant for impulse purchases – it’s a commitment to conservation.

If you’re interested in supporting Hawaiian native plants but can’t access Kauai schiedea through proper channels, consider other native Hawaiian species that are more readily available through established nurseries. Every native plant you grow helps support Hawaii’s unique ecosystems.

Remember, when we choose to grow rare and endangered plants, we become stewards of Hawaii’s botanical heritage. It’s a responsibility that comes with the privilege of witnessing these living treasures up close.

Kauai Schiedea

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Caryophyllales

Family

Caryophyllaceae Juss. - Pink family

Genus

Schiedea Cham. & Schltdl. - schiedea

Species

Schiedea kauaiensis H. St. John - Kauai schiedea

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