Isophysis tasmanica Plant Care
Isophysis tasmanica T.Moore
Updated · Sources · How we source care data
Isophysis is a genus of herbaceous, perennial and rhizomatous plants in the Iris family (Iridaceae). A monotypic genus formerly known as Hewardia, it contains a single species, Isophysis tasmanica is a Palaeoendemic found only in the south-west of Tasmania.
Every 7–10 days
Full sun to partial shade
50–75°F
40–60%
At a glance
How do you care for Isophysis tasmanica?
Water Isophysis tasmanica 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 50–75°F (10–24°C) and 40–60% humidity. Fertilize it every 6 months during the growing season.
What Is the Isophysis tasmanica?
Isophysis tasmanica (Isophysis tasmanica) belongs to the Iridaceae family within the Isophysis genus.
Isophysis tasmanica displays a clumping perennial growth habit, reaching up to 1.5 ft tall with a spread of approximately 1 ft. Isophysis tasmanica produces showy flowers in shades of purple, blue, or white.
Leaf size: approximately 12 inches.
How Often Should You Water a Isophysis tasmanica?
Isophysis tasmanica 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 Isophysis tasmanica Need?
Isophysis tasmanica thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Isophysis tasmanica Prefer?
Isophysis tasmanica grows best at temperatures of 50–75°F. Isophysis tasmanica prefers humidity levels of 40–60%.
Temperature
50–75°F
Humidity
40–60%
What Soil Mix Works Best for a Isophysis tasmanica?
Well-draining sandy loam with added organic matter. Good drainage is essential for Isophysis tasmanica to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Isophysis tasmanica?
Feed Isophysis tasmanica 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 Isophysis tasmanica?
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 Isophysis tasmanica?
Isophysis tasmanica can be propagated through division of offsets, seeds.
Is the Isophysis tasmanica Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Isophysis tasmanica, 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 Isophysis tasmanica?
Isophysis tasmanica 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 Isophysis tasmanica Need?
Isophysis tasmanica grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Isophysis tasmanica as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Isophysis tasmanica 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 Isophysis genus — compare its care with other Isophysis species on PlantoScan.
Isophysis is part of the Iridaceae plant family — browse all Iridaceae genera and species.
Isophysis tasmanica 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: Isophysis tasmanica T.Moore, family Iridaceae (first published in Proc. Linn. Soc. London 2: 212 (1853)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Isophysis tasmanica, 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 12a, 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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