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Umbrella papyrus

Cyperus involucratus

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Umbrella papyrus · Cyperus involucratus

Umbrella-like whorls on straight stems, happy in wet conditions.

Care and placement

Likes full sun to part shade and constantly moist soil; tolerates standing water up to 15 cm; rests from autumn to early spring; balanced feed monthly.

Draft mature dimensions

Maximum height (cm): 100 cm · Maximum spread (cm): 60 cm

Things to consider

The sources checked (RHS, Gardenia, UNF) do not list toxicity for Cyperus involucratus; in warm climates it can be weedy, so grow it in a container to limit spread.

Unknown evidence does not mean safe. Decorative plants are not automatically edible.

Information is compiled from multiple reputable sources for reference. If you spot an error, please contact us so we can check and update it.

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How to grow and care for it

  1. Planting and pot

    Plant in a pot or water tub with loam-based mix, standing in a tray of water. Containers limit spread. Repot every 1–2 years since it grows fast.

  2. Light

    Full sun to part shade; indoors bright to medium light with a few hours of sun. Too little light gives weak stems that do not stand upright.

  3. Watering

    Keep soil constantly moist; it can stand in water up to 15 cm. In its rest from autumn to early spring keep it barely moist and stop feeding. Dry air causes brown tips and spider mites.

  4. Feeding

    RHS: balanced liquid fertilizer monthly in the growing season; none during the rest period.

  5. Pruning

    Cut yellowed stems at the base; a shabby plant can be cut to the ground and new foliage regrows from the roots.

  6. Propagation

    Divide in early spring: unpot, cut the root ball top to bottom into 2–4 pieces and repot; division is needed every few years.

  7. Pests and common problems

    RHS: generally pest-free; other sources list spider mites (dry air, webbing), mealybugs, scale and whiteflies — rinse stems weekly; outdoors slugs and powdery mildew.

  8. For plentiful, healthy leaves

    For dense umbrella whorls: lots of sun, constant water, regular feeding in the growing season and division when crowded. Flowers are small and brownish; grown for foliage.