Plants
Umbrella Sedge
Cyperus alternifolius · Cyperaceae
The umbrella sedge is the one houseplant you cannot overwater — as long as you water generously. As a marsh plant it loves wet feet and prefers to stand permanently in water. Above its slender stalks, umbrella-shaped whorls of leaves unfold, giving any room a light, almost Mediterranean feel. We buy our umbrella sedge in dense, sturdy quality at the Veiling Rhein-Maas.
- Light
- Bright to full sun; the more light, the denser and sturdier the stalks.
- Watering
- Very generous — as a marsh plant, the umbrella sedge can and should stand permanently in water.
- Care level
- Easy
- Botanical
- Cyperus alternifolius
Botanically the umbrella sedge is a close relative of true papyrus (Cyperus papyrus), from which the Egyptians made their writing material. Incidentally, what looks like leaves at the top of each stalk are bracts — the actual flowers appear as inconspicuous brownish spikelets between the umbrella rays.
Care rule number one turns everything familiar upside down: standing water is not a mistake here but the whole point. Ideally the pot sits in a tall outer container with a permanent two to five centimetres of water. The most common and practically only fatal care mistake is a dried-out root ball — the umbrellas then turn straw-like within days.
Brown umbrella tips are the most common cosmetic issue, caused by dry heating air or a brief water shortage. Cut affected stalks out near the base; new ones constantly push up from the dense rhizome. Regular misting prevents the problem.
Besides Cyperus alternifolius there is the dainty dwarf form Zumula, often sold as a cat-grass alternative, and the imposing true papyrus with finely divided umbrellas. They all want the same: water aplenty, warmth and lots of light.
Propagation is a charming kitchen experiment: cut an umbrella with about five centimetres of stalk, trim the rays and place it upside down in a glass of water — within a few weeks, roots and new shoots grow from the centre of the umbrella. That is exactly what the plant does in nature when stalks topple into the water.
At home the umbrella sedge is a natural humidifier: it evaporates plenty of water through its large leaf surface, improving the indoor climate — one reason we like to place it next to drought-stressed neighbours such as ferns and calatheas. It is non-toxic to cats, though the stalk edges are sharp.
Is Umbrella Sedge toxic to children and pets?
- Children
- Non-toxic
- Cats
- Non-toxic
- Dogs
- Non-toxic
The umbrella sedge is considered non-toxic to cats, dogs and children and is even sold as a cat-grass alternative. The stalk edges are sharp, however — hastily eating large amounts can mechanically irritate mouth and stomach.
Overview: toxic & non-toxic plants for cats, dogs and children
Care
- 01Place bright to sunny; the umbrella sedge also tolerates direct sun.
- 02Always allow wet feet: keep the outer pot permanently filled with two to five centimetres of water.
- 03Never let the root ball dry out — that is the only serious care mistake.
- 04Mist regularly, especially in the heating season, to prevent brown umbrella tips.
- 05Feed lightly every two weeks from spring to autumn.
- 06Cut brown stalks out near the base; new ones grow continually from the rhizome.
Frequently asked
- Is umbrella sedge toxic to cats?
- No, umbrella sedge is non-toxic to cats, and the dwarf form Zumula is even sold specifically as nibbling grass for cats. Just mind the sharp leaf edges: if your cat is a greedy eater, soft seed-grown cat grass is the better offer.
- How much water does the umbrella sedge really need?
- More than any other common houseplant: the root ball can stand permanently in water, ideally two to five centimetres in a tall outer pot. What causes root rot in other plants is the normal state for this marsh dweller. The only thing it does not forgive is drying out.
- Why is my umbrella sedge getting brown tips?
- Dry heating air or a briefly dried-out root ball is usually to blame. Check the water level in the outer pot, mist regularly and remove badly affected stalks near the base — replacements from the rhizome come quickly and fresh green.
- How do I propagate umbrella sedge?
- Easiest upside down: cut a healthy umbrella with a short piece of stalk, shorten the leaf rays by half and place it inverted in a glass of water. Roots and young plants sprout from the centre of the umbrella. Alternatively, divide the rootstock when repotting.