Photo: Simone LittledaleCC BY 4.0via iNaturalistresized / cropped
Spike Trisetum Plant Care
Trisetum spicatum (L.) K.Richt.
Updated · Sources · How we source care data
With its distinctive spike-like panicles of purple-hued flowers, this plant originates from North America and is highly sought after by plant collectors for its unique aesthetic appeal. The slender, lance-shaped leaves add to its charm, making it a desirable addition to any garden or collection.
Every 7–14 days
Full sun to partial shade
50–80°F
40–70%
At a glance
How do you care for Spike Trisetum?
Water Spike Trisetum 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 50–80°F (10–27°C) and 40–70% humidity. Fertilize it every 8 months during the growing season.
Where Is the Spike Trisetum Native To?
What Is the Spike Trisetum?
Spike Trisetum (Trisetum spicatum) belongs to the Poaceae family within the Trisetum genus. Spike Trisetum is native to North America, Eurasia, and South America. Spike Trisetum is also known as Alpine False Oats, Alpine Trisetum.
Spike Trisetum displays an upright, tufted grass growth habit, reaching up to 3 ft tall with a spread of approximately 1.5 ft. Spike Trisetum produces small, inconspicuous flowers in terminal panicles.
Leaf size: approximately 12 inches.
How Often Should You Water a Spike Trisetum?
Trisetum spicatum 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 Spike Trisetum Need?
Spike Trisetum thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Spike Trisetum Prefer?
Trisetum spicatum grows best at temperatures of 50–80°F. Spike Trisetum prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Spike Trisetum?
Well-draining loamy soil with good organic content. Good drainage is essential for Spike Trisetum to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Spike Trisetum?
Feed Spike Trisetum 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 Spike Trisetum?
Divide and replant clumps every 2-3 years. 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 Spike Trisetum?
Spike Trisetum can be propagated through seeds, division of clumps.
Is the Spike Trisetum Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Spike Trisetum, 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 Spike Trisetum?
Spike Trisetum 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 Spike Trisetum Need?
Spike Trisetum grows outdoors in USDA Zone 2a – 7b. It survives winters down to planting zone 2a. Spike Trisetum is native to North America, Eurasia, and South America.
Hardiness Zone
Zone 2a – 7b
Keep exploring plants
Spike Trisetum 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 Trisetum genus — compare its care with other Trisetum species on PlantoScan.
Trisetum is part of the Poaceae plant family — browse all Poaceae genera and species.
Spike Trisetum 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: Trisetum spicatum (L.) K.Richt., family Poaceae (first published in Pl. Eur. 1: 59 (1890).) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Spike Trisetum, 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.
- Photo: Simone Littledale, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 2a – 7b, estimated from the plant's typical growing conditions.
- 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.
Identify Plants Like the
Spike Trisetum Instantly
Scan any plant with your phone camera and get instant ID, care tips, water and fertilizer reminders, and health checks — all in one app.
Free
to download
iOS & Android
platforms
Light & dark
mode
100,000+
species