Cyperus ‘Zumula’ (Cat Grass)

A fine-leaved sedge from the wet tropics

The dense narrow leaves and rhizomatous base of this cultivated sedge account for its use as cat grass. New shoots rise closely together, producing the soft grassy clump associated with ‘Zumula’. Short rhizomes renew the clump from its base.

Cyperus cyperoides is a perennial of the wet tropics with a broad native range from Africa across southern and eastern Asia to the Pacific. Its naturally moist habitat supports consistently moist, aerated container culture; permanent submersion is unnecessary.

Care for healthy tropical growth

Dividing and refreshing the grassy rhizomes

Repot when the fibrous root mass distorts the container, the pot dries unusually fast or the centre has become compacted and stale. Move to a broad pot only slightly wider or divide the clump into substantial rooted sections.

Light for dense cat-grass shoots

Give Cyperus ‘Zumula’ strong filtered daylight close to an east, south or west window. Gentle direct sun is useful after acclimation, but hot glass can dry and bleach the narrow green growth quickly.

Roots and substrate

Keep the root ball consistently moist and water as soon as the surface begins to dry. A brief dry spell can crisp whole sections, while cold, stagnant and airless mix can rot the dense fibrous roots.

Moisture-retentive mix and rhizomes

Use a moisture-retentive but aerated mix based on quality potting substrate or coir, with fine bark and perlite or pumice added for airflow. The dense fibrous roots and short rhizomes need regular access to moisture without sitting in decomposed mud.

Dilute feeding for fresh grassy shoots

Apply balanced complete fertiliser at a low dose while fresh grassy shoots are forming. Repeat only if the clump is still growing strongly and the product label allows it.

Cutting, handling and renewal

Well-lit growth needs no stake. Divide the rhizome clump for permanent size control.

Troubleshooting Cyperus ‘Zumula’ cat grass

• The green tuft droops and crisps together: This moisture-loving sedge loses firmness quickly when its dense root ball dries. Check the centre of the pot and rewet it thoroughly if dry, making sure no hard dry core remains. If the mix is already wet, cold or sour-smelling, inspect for damaged roots before watering again.
• Stems are kinked, flattened or chewed: Cats commonly crush or graze the narrow growth, leaving blunt cuts and bends. Spreading lesions indicate a separate problem. Remove a badly damaged stem at the base and protect the centre while replacements form.
• Brown tips appear although the mix is moist: Old growth, concentrated fertiliser or hard-water salts can brown the fine tips despite adequate moisture. Flush the pot with plain water and remove fully brown stems at the base. If yellowing begins in a slimy, foul-smelling base, inspect the roots; keeping the pot wetter will not correct decay.
• New growth is pale, thin and leaning: Insufficient light produces weak stems that cannot remain upright. Move the plant gradually into stronger filtered light and rotate the pot. Check that a dense root mass is not also exhausting the small volume of mix. Staking does not strengthen growth that has already formed in poor light.
• Sections loosen from a slimy base: Cold, stagnant or airless mix can destroy the rhizomes even though the plant likes steady moisture. Remove the clump from the pot, cut away black or slimy roots and retain only firm rooted divisions. Clean the container and repot into fresh aerated mix, keeping it moist but not permanently submerged.

Cyperus ‘Zumula’ (Cat Grass) has unestablished pet safety

• Cyperus ‘Zumula’ (Cat Grass) has unestablished pet safety.
• Do not treat this plant as non-toxic; keep it away from cats and dogs that chew plants.
• If any part is swallowed, contact a veterinarian for advice and monitor for symptoms.

Cyperus: Greek kyperos

Cyperus comes from Greek kyperos, an ancient name for sedges.