Siamese fountain grass Plant Care
Kerriochloa siamensis C.E.Hubb.
Updated · Sources · How we source care data
With its striking, narrow green leaves that cascade gracefully downwards, this plant native to Thailand and Laos adds a unique touch to any collection. Plant collectors are drawn to the Kerriochloa siamensis for its elegant and unusual foliage, making it a sought-after addition to their gardens.
Every 7–14 days
Full sun to partial shade
65–85°F
40–70%
At a glance
How do you care for Siamese fountain grass?
Water Siamese fountain grass every 7–14 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 65–85°F (18–29°C) and 40–70% humidity. Fertilize it every 8 months during the growing season.
What Is the Siamese fountain grass?
Siamese fountain grass (Kerriochloa siamensis) belongs to the Poaceae family within the Kerriochloa genus. Siamese fountain grass is native to Thailand and Vietnam.
Siamese fountain grass displays a clumping grass growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Siamese fountain grass produces small inconspicuous flowers in spikelets.
Leaf size: approximately 12 inches.
How Often Should You Water a Siamese fountain grass?
Kerriochloa siamensis requires watering every 7–14 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–14 days
Let soil partially dry between waterings
What Light Does the Siamese fountain grass Need?
Siamese fountain grass thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Siamese fountain grass Prefer?
Kerriochloa siamensis grows best at temperatures of 65–85°F. Siamese fountain grass prefers humidity levels of 40–70%.
Temperature
65–85°F
Humidity
40–70%
What Soil Mix Works Best for a Siamese fountain grass?
Well-draining loamy soil with added compost for nutrients. Good drainage is essential for Siamese fountain grass to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Siamese fountain grass?
Feed Siamese fountain grass every 8 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 8 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Siamese fountain grass?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Siamese fountain grass?
Siamese fountain grass can be propagated through division, seeds.
Is the Siamese fountain grass Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Siamese fountain grass, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Siamese fountain grass?
Siamese fountain grass is susceptible to aphids, grasshoppers, cutworms. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Siamese fountain grass Need?
Siamese fountain grass grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. Siamese fountain grass is native to Thailand and Vietnam. In cooler regions, grow Siamese fountain grass as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13b
Keep exploring plants
Siamese fountain grass is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Kerriochloa genus — compare its care with other Kerriochloa species on PlantoScan.
Kerriochloa is part of the Poaceae plant family — browse all Poaceae genera and species.
Siamese fountain grass thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Kerriochloa siamensis C.E.Hubb., family Poaceae (first published in Hooker's Icon. Pl. 35: t. 3494 (1951)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Siamese fountain grass, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 13b, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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