Kauai Flatsedge

Cyperus rockii

Native to:
Hawaii, United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Cyperaceae
Genus:
Cyperus
Species:
Cyperus rockii
USDA Symbol:
CYRO2

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Graminoid
Height:
90 cm
Light Requirements:
Full Sun
Drought Tolerance:
Low
Bloom Months:
jun,jul,aug,sep
Bloom Colors:
brown, green

Garden & Ecology Notes

Wildlife Value:
birds, waterfowl
Deer Resistant:
Yes

Soil Requirements

Soil Type:
moist, well-drained loamy soil
pH:
5.5 - 7.0 (slightly acidic to neutral)
Drainage:
tolerates poor drainage
Moisture:
consistently moist
Notes:
native to wetland areas, prefers high humidity

Propagation & Germination

Stratification:
Cold/moist stratification required — 30–60 days
Germination Time:
14–30 days
Notes:
Seeds germinate best with consistent moisture and light exposure.

The above propagation data sourced from Claude AI