Cyperus

Cyperus alternifolius

Stands in water quite happily, so long as that water is refreshed rather than left to go stagnant.

Light Part shade
Height 90 cm
Spread 17.7 in
Spacing 45 cm

Spacing & sowing

Plant spacing
17.7 in
In-row spacing
17.7 in
Between rows
22 in
Square-foot density
Not suited to SFG

Growing

Type
Houseplant · Perennial
Botanical family
Mixed / other
Sunlight
Part shade
Feeding
All-purpose balanced
Frost tolerant
No
Flowering
June

Through the year

  • Mar–Jun Spring Growth
  • Jun–Dec Flowering
  • Jan–Mar Flowering

Garden allies

Beneficial predators that hunt this plant's pests — grow their favourite flowers nearby to recruit them. companion plant

  • Big-eyed bug Geocoris spp.

    A stubby 3 mm bug with enormous wrap-around eyes, working the soil surface and the low foliage for aphids, mites, thrips and insect eggs. It is the main natural check on chinch bugs in a lawn and it is killed outright by insecticide.

  • Green lacewing Chrysoperla carnea

    Its bristly larvae — "aphid lions" — impale aphids, mealybugs, thrips, and mite colonies, eating hundreds a week. Adults feed on nectar and pollen from small open flowers and overwinter in hollow stems left standing.

  • Ladybird (lady beetle) Coccinellidae

    The gardener’s favorite ally: adults and their alligator-shaped larvae each eat thousands of aphids, plus scale, mealybugs, and other soft-bodied sap-suckers. Grow flat, open flowers for the adults and never spray a colony that ladybird larvae are already working.

  • Minute pirate bug Orius spp.

    A pinhead-sized true bug that is the best natural check on thrips, and happily spears aphids, mites, and insect eggs too. It needs pollen when prey is scarce, so keep something flowering nearby.

  • Predatory mites Phytoseiulus & Amblyseius

    Fast orange mites that hunt spider mites egg-by-egg, and cousins that clear thrips and fungus-gnat larvae. Sold as a biological control for greenhouses; outdoors they follow humidity — mist and mulch, don’t dust with sulfur.

  • Rove beetle Staphylinidae

    Slim, quick beetles with short wing cases that hunt in soil and litter, taking root-fly eggs and larvae, fungus-gnat larvae, and mites. Mulch and undisturbed ground keep them resident year-round.

    Plant nearby MintThyme