How to Care for Cenchrus setaceus (Purple fountain grass)
Korean name: 자주수크령
An ornamental grass with fine, fountain-like leaves and bottlebrush plumes from summer into autumn. It is common in landscaping and flower beds, usually as the red-leaved form (Rubrum). It is not frost-hardy, so in Korea it is mostly grown as an annual.
Key facts
- Category: Foliage plant
- Difficulty: Easy
- Where to keep: outdoors
- Native to: North Africa, Middle East
- Growth rate: Fast
- Pets: No known toxicity, so it is fine to keep around pets.
- Traits: Ornamental grass, Landscaping, Autumn plumes, Drought-tolerant
- Also known as: Purple fountain grass, Fountain grass
Care Guide
- Light: Direct sun. In shade the leaf colour fades and plumes are sparse.
- Watering: Drought-tolerant once established. In a pot, water thoroughly when the topsoil is dry.
- Soil: Well-draining soil; poor soil is fine
- Humidity: No special care needed
- Temperature: 15–35°C. Bring it indoors below 5°C, or grow it as an annual.
- Fertilizer: One dose of slow-release fertiliser in spring is enough
Detailed care guide
Purple fountain grass is an ornamental grass whose reddish leaves and plumes arch like a fountain. Given enough sun it tolerates drought and needs very little care.
Watering
It is drought-tolerant once established. In a pot, water thoroughly when the topsoil is dry; in the ground, only its first summer needs attention.
Light
It loves direct sun. In shade the red leaves fade to green and plumes are sparse.
Humidity
No special attention to humidity is needed.
Temperature
It grows well at 15–35°C. It is not frost-hardy, so bring pots indoors below 5°C, or grow it as an annual and replant each spring.
A common first-timer mistake
If you overwintered it indoors, cut the yellowed leaves back close to the base in spring. New leaves fill it out again.
If you have pets
Purple fountain grass is considered non-toxic to pets. Just keep the bristly seed heads out of noses and ears.
Through the Seasons
Plant it after the last frost in late spring and plumes appear from summer into autumn. One dose of slow-release fertiliser in spring is enough. In late autumn the plumes fade to straw, which is attractive too. Move pots to a bright indoor spot before temperatures drop below freezing.
Common Problems and Fixes
Leaves turning green mean too little sun; move it to the sunniest spot you have. Constantly wet roots can rot the crown, so use well-draining soil. It has very few pests or diseases.
Repotting and Propagation
In a pot, move it up a size in spring once the clump has grown, dividing it at the same time. The red-leaved form (Rubrum) rarely sets seed, so it is increased by division.
Who It's Good For
It suits anyone who wants a seasonal accent in a flower bed or large container, and anyone looking for a low-maintenance plant. It looks especially good in a sunny garden or rooftop.
Written by AI from the care facts in this entry. Treat it as a starting point.
Common questions
How often should you water Cenchrus setaceus?
Drought-tolerant once established. In a pot, water thoroughly when the topsoil is dry. Roughly every 7 days is the baseline; adjust for the season and the spot it sits in.
Where should you keep Cenchrus setaceus?
It likes Direct sun. In shade the leaf colour fades and plumes are sparse.. You can grow it outdoors. Use Well-draining soil; poor soil is fine.
Is Cenchrus setaceus safe around pets?
No known toxicity, so it is fine to keep around pets.
Is Cenchrus setaceus good for beginners?
Difficulty: Easy. It is forgiving enough for a first plant. Keep it around 15–35°C. Bring it indoors below 5°C, or grow it as an annual.. Humidity: No special care needed. Fertilise One dose of slow-release fertiliser in spring is enough.