The Cyperus alternifolius 'Zumula', often referred to as Umbrella Papyrus or simply "Cat Grass," is a refreshing houseplant that brings a vibrant, green atmosphere into your home. With its fine, grass-like leaves growing in dense clumps, this plant adds a touch of tropical marshland to any environment. A fascinating characteristic of this plant is its incredible preference for water – unlike most other houseplants, it genuinely loves to have "wet feet." The bright, fresh green color of its stems creates a light, friendly appearance and makes for a great eye-catcher.
Typical characteristics:
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fine, grass-like and bright green leaves
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fast-growing, bushy and upright
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absolutely pet-friendly (the ultimate favorite for cats!)
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ensures a fresh indoor climate and increases humidity
☀️ Location, Soil, and More.
Umbrella Papyrus likes it bright and warm. The right location and, most importantly, sufficient water are crucial to prevent the grass-like leaves from drying out.
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bright to sunny location
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tolerates direct sun well, as long as its water needs are met
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prefers high humidity
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Perfect for bright living rooms, windowsills, or bathrooms.
🌿 Care of Cyperus alternifolius 'Zumula' – Overview
This plant is not only a feast for the eyes but also extremely easy to care for, provided its most important need (water!) is met. It is excellent for beginners and pet owners.
🌱 Growth
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upright growing and clump-forming
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remains relatively compact at about 40 to 50 cm
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quickly grows into a dense, green bush
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contributes to a fresh and lively appearance.
🍃 Leaves
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very narrow, long and grass-like
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bright fresh green
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soft enough for cats to nibble on safely
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hang slightly over in elegant arcs from the center outwards.
💧 Watering / Water
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Unlike almost all other plants, the Umbrella Papyrus must stand in water – it is a marsh plant!
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keep soil constantly wet
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can and should stand in water (e.g., always leave 2–3 cm of water in the cachepot or saucer)
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best to water with low-lime, room-temperature water
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never let it dry out – dry root balls immediately lead to brown leaves.
🌼 Fertilizing
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from spring to autumn: every 2–4 weeks
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liquid green plant fertilizer at half concentration
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reduce or stop fertilizing significantly in winter
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avoid over-fertilization, as this can harm the fine roots.
🌱 Substrate
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A substrate that retains moisture well is most important here
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normal, high-quality potting soil is ideal
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high humus content
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does not need to be highly permeable to water (drainage is unimportant here)
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can also be excellently kept in hydroponics.
🪴 Repotting
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every year in spring, as the plant grows very quickly
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quickly needs larger pots when roots fill the old pot
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replace old, depleted soil at this time.
✂️ Pruning
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The Cyperus 'Zumula' does not require regular pruning
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simply cut dried, brown stalks close to the ground
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tips chewed by cats can be trimmed smoothly for aesthetic reasons
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use clean tools.
🌱 Propagating Cyperus alternifolius 'Zumula'
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Propagation is super easy by division
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when repotting, simply gently pull the root ball apart with your hands or cut it with a clean knife
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place the divisions in their own pots and water thoroughly immediately.
☠️ Is Umbrella Papyrus poisonous?
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No – Cyperus alternifolius 'Zumula' is completely non-toxic
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safe and even beneficial for cats (often specifically sold as cat grass to help with the regurgitation reflex for hairballs)
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safe for dogs and small pets
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Similar to the Spider Plant (Chlorophytum), it is an absolutely safe option for all pet owners.
👉 You can place it anywhere your furry friends roam and like to look for a small green snack, without hesitation.
🧠 Other Care Tips
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Umbrella Papyrus loves a humid environment
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Brown leaf tips are almost always a sign of too little water or too dry heating air.
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Regularly mist the leaves with low-lime water, especially during the winter months.
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The plant loves temperatures around 20–22 °C and should not be kept colder than 15 °C in winter.
✅ Conclusion
With its lush green appearance and absolutely pet-friendly nature, Cyperus alternifolius 'Zumula' is an excellent choice. It is extremely easy to care for – as long as you don't forget to water it – suitable for various bright rooms, and creates a fresh, lively atmosphere that your house cat will also enjoy. Let this beautiful grass beautify your interior.