Photo: no rights reservedCC0 1.0via iNaturalist
Gaspé Arrowgrass Plant Care
Triglochin gaspensis Lieth & D.Löve
Updated · Sources · How we source care data
This plant's long, narrow leaves with a distinct curly shape make it immediately identifiable. Originating from the Gaspe Peninsula in Quebec, Canada, Triglochin gaspensis is highly sought after by plant collectors for its unique appearance and rarity in cultivation.
Every 2–4 days
Full sun to part shade
50–75°F
60–80%
At a glance
How do you care for Gaspé Arrowgrass?
Water Gaspé Arrowgrass every 2–4 days, letting the top layer of soil dry out between waterings, and give it full sun to part shade. It prefers temperatures of 50–75°F (10–24°C) and 60–80% humidity. Fertilize it every month during the growing season.
Where Is the Gaspé Arrowgrass Native To?
What Is the Gaspé Arrowgrass?
Gaspé Arrowgrass (Triglochin gaspensis) belongs to the Juncaginaceae family within the Triglochin genus. Gaspé Arrowgrass is native to eastern Canada, and Maine in the north-eastern United States.
Gaspé Arrowgrass displays a clumping, aquatic perennial growth habit, reaching up to 1 ft tall with a spread of approximately . Gaspé Arrowgrass produces small greenish-white flowers in dense spikes.
Leaf size: approximately 6 inches.
How Often Should You Water a Gaspé Arrowgrass?
Triglochin gaspensis requires watering every 2–4 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 2–4 days
Let soil partially dry between waterings
What Light Does the Gaspé Arrowgrass Need?
Gaspé Arrowgrass thrives in full sun to part shade.
Light Requirement
Full sun to part shade
What Temperature and Humidity Does the Gaspé Arrowgrass Prefer?
Triglochin gaspensis grows best at temperatures of 50–75°F. Gaspé Arrowgrass prefers humidity levels of 60–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
50–75°F
Humidity
60–80%
What Soil Mix Works Best for a Gaspé Arrowgrass?
Moist, acidic soil with high organic content. Good drainage is essential for Gaspé Arrowgrass to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Gaspé Arrowgrass?
Feed Gaspé Arrowgrass every month 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 month
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Gaspé Arrowgrass?
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 Gaspé Arrowgrass?
Gaspé Arrowgrass can be propagated through seeds, division of rhizomes.
Is the Gaspé Arrowgrass Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Gaspé Arrowgrass, 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 Gaspé Arrowgrass?
Gaspé Arrowgrass is susceptible to no common pests known. 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 Gaspé Arrowgrass Need?
Gaspé Arrowgrass grows outdoors in USDA Zone 3b – 6b. It survives winters down to planting zone 3b. Gaspé Arrowgrass is native to eastern Canada, and Maine in the north-eastern United States.
Hardiness Zone
Zone 3b – 6b
Keep exploring plants
Gaspé Arrowgrass 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 Triglochin genus (family Juncaginaceae) — search all Triglochin species in the plant lookup.
Gaspé Arrowgrass 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: Triglochin gaspensis Lieth & D.Löve, family Juncaginaceae (first published in Canad. J. Bot. 39: 1271 (1961)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Gaspé Arrowgrass, 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: Public domain, CC0 1.0, iNaturalist — original.
- Hardiness zone: USDA Zone 3b – 6b, 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.
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