Umbrella Papyrus (Cyperus alternifolius)

Umbrella Papyrus

Cyperus alternifolius

Its umbrella-like fronds float like green parasols over water edges. Evergreen aquatic herbaceous perennial; common names: umbrella papyrus, umbrella sedge.

Partial sun
7/week
Beginner
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Plant Needs

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Sunlight Bright indirect to partial direct light; tolerates full sun in cool climates, avoid harsh midday sun in hot regions to prevent frond scorching
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Watering Keep soil constantly moist or submerge base in 2–5 cm of standing water; never allow the root zone to dry out completely
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Temperature Thrives in warm temperate to tropical conditions; protect from frost below 10°C to prevent stem damage
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Characteristics

  • Leaf: Modified bracts form whorled, umbrella-like clusters at stem tops; linear, bright green, up to 30 cm long
  • Flower: Tiny brown spikelets clustered at the base of bracts; inconspicuous and non-showy
  • Stem: Erect, triangular, hollow green stems that grow in tight, dense clumps
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Care Guide

Watering

Maintain consistent standing water level; top up daily as needed in hot weather

Fertilization

Diluted balanced liquid feed every 2 weeks. Avoid over-fertilizing to prevent algal growth in standing water setups

Banana peel compost tea:Compost banana peels for 2 weeks, steep in water for 24 hours, dilute 1:20 for root drench; discard solid peels to avoid mold growth
Pruning
  • Trim brown, dead fronds at the base to maintain a neat, dense clump
  • Divide overcrowded clumps in early spring to encourage new, vigorous growth
  • Remove spent flower heads to redirect energy toward foliage production
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic; no harmful effects from ingestion or contact

Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental water garden plant; indoor container foliage for bright, humid spaces