Least Arrowgrass Plant Care
Triglochin minutissima F.Muell.
Updated · Sources · How we source care data
This plant's most distinctive visual feature is its slender, bright green leaves that form a dense rosette. Native to New Zealand, Triglochin minutissima is highly sought after by plant collectors for its unique growth habit and rarity in cultivation. Its delicate appearance and compact size make it a desirable addition to any plant collection.
Every 2–4 days
Full sun to part shade
50–75°F
60–80%
At a glance
How do you care for Least Arrowgrass?
Water Least 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 2 months during the growing season.
Where Is the Least Arrowgrass Native To?
What Is the Least Arrowgrass?
Least Arrowgrass (Triglochin minutissima) belongs to the Juncaginaceae family within the Triglochin genus. Least Arrowgrass is native to wetland habitats in Australia and New Zealand. Least Arrowgrass is also known as Arrowgrass.
Least Arrowgrass displays a clumping, aquatic perennial growth habit, reaching up to tall with a spread of approximately . Least Arrowgrass produces small greenish-white flowers in dense spikes.
Leaf size: approximately 4 inches.
How Often Should You Water a Least Arrowgrass?
Triglochin minutissima 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 Least Arrowgrass Need?
Least Arrowgrass thrives in full sun to part shade.
Light Requirement
Full sun to part shade
What Temperature and Humidity Does the Least Arrowgrass Prefer?
Triglochin minutissima grows best at temperatures of 50–75°F. Least 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 Least Arrowgrass?
Moist, acidic soil with high organic content. Good drainage is essential for Least Arrowgrass to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Least Arrowgrass?
Feed Least Arrowgrass every 2 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 2 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 Least 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 Least Arrowgrass?
Least Arrowgrass can be propagated through seeds, division of rhizomes. Similar propagation techniques also apply to gaspé arrowgrass plant care, which shares the same genus.
Is the Least Arrowgrass Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Least 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 Least Arrowgrass?
Least 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.
Keep exploring plants
Least 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 — compare its care with other Triglochin species on PlantoScan.
Triglochin is part of the Juncaginaceae plant family — browse all Juncaginaceae genera and species.
Least Arrowgrass thrives in bright light and direct sun — see other bright-light plants.
More Triglochin Species
Other Triglochin species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Triglochin minutissima F.Muell., family Juncaginaceae (first published in Fragm. 6: 82 (1867)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Least 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.
- 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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