North's Trimezia Plant Care
Trimezia northiana (Schneev.) Ravenna
Updated · Sources · How we source care data
Trimezia northiana, synonym Neomarica northiana, also known as North's false flag or walking iris, is a flowering plant, native to Brazil, with a rhizomatous rootstock, belonging to the iris family, Iridaceae.
Every 7–10 days
Full sun to partial shade
60–80°F
40–70%
At a glance
How do you care for North's Trimezia?
Water North's Trimezia every 7–10 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 60–80°F (16–27°C) and 40–70% humidity. Fertilize it every 6 months during the growing season. It is reported as toxic to pets, so keep it out of reach of pets.
Where Is the North's Trimezia Native To?
What Is the North's Trimezia?
North's Trimezia (Trimezia northiana) belongs to the Iridaceae family within the Trimezia genus. North's Trimezia is native to Brazil, with a rhizomatous rootstock, belonging to the iris family, Iridaceae.
North's Trimezia displays a clumping perennial with narrow leaves growth habit, reaching up to 1.5 ft tall with a spread of approximately 1 ft. North's Trimezia produces showy yellow flowers with purple markings.
Leaf size: approximately 12 inches.
How Often Should You Water a North's Trimezia?
Trimezia northiana requires watering every 7–10 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 7–10 days
Let soil partially dry between waterings
What Light Does the North's Trimezia Need?
North's Trimezia thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the North's Trimezia Prefer?
Trimezia northiana grows best at temperatures of 60–80°F. North's Trimezia prefers humidity levels of 40–70%.
Temperature
60–80°F
Humidity
40–70%
What Soil Mix Works Best for a North's Trimezia?
Well-draining, slightly acidic soil with added organic matter like compost or peat moss. Good drainage is essential for North's Trimezia to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a North's Trimezia?
Feed North's Trimezia every 6 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 6 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 North's Trimezia?
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 North's Trimezia?
North's Trimezia can be propagated through division of rhizomes, seeds. Similar propagation techniques also apply to steyermark's trimezia plant care, which shares the same genus.
Is the North's Trimezia Toxic to Pets and Children?
Toxic (caution)
Reported as toxic in our plant data. Not verified by the ASPCA.
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 North's Trimezia?
North's Trimezia is susceptible to aphids, thrips, spider mites. 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 North's Trimezia Need?
North's Trimezia grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. North's Trimezia is native to Brazil, with a rhizomatous rootstock, belonging to the iris family, Iridaceae. In cooler regions, grow North's Trimezia as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
North's Trimezia 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 Trimezia genus — compare its care with other Trimezia species on PlantoScan.
Trimezia is part of the Iridaceae plant family — browse all Iridaceae genera and species.
North's Trimezia 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: Trimezia northiana (Schneev.) Ravenna, family Iridaceae (first published in Extinction Is Forever : 257 (1977)) — World Flora Online record, IPNI name record.
- Pet toxicity: North's Trimezia is reported as toxic to pets in our plant data (not verified by the ASPCA), so treat it with caution. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 13a, 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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