Caustis dioica Plant Care
Caustis dioica R.Br.
Updated · Sources · How we source care data
Caustis dioica is a sedge that is native to Western Australia.
Every 4–7 days
Partial to full shade
60–75°F
50–70%
At a glance
How do you care for Caustis dioica?
Water Caustis dioica every 4–7 days, letting the top layer of soil dry out between waterings, and give it partial to full shade. It prefers temperatures of 60–75°F (16–24°C) and 50–70% humidity. Fertilize it every 6 months during the growing season.
Where Is the Caustis dioica Native To?
What Is the Caustis dioica?
Caustis dioica (Caustis dioica) belongs to the Cyperaceae family within the Caustis genus. Caustis dioica is native to Western Australia.
Caustis dioica displays a clumping perennial grass growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Caustis dioica produces small inconspicuous flowers.
Leaf size: approximately 12 inches.
How Often Should You Water a Caustis dioica?
Caustis dioica requires watering every 4–7 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 4–7 days
Let soil partially dry between waterings
What Light Does the Caustis dioica Need?
Caustis dioica thrives in partial to full shade. The optimal light range is 100–500 lux. Avoid placing Caustis dioica in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Partial to full shade
100–500 lux
What Temperature and Humidity Does the Caustis dioica Prefer?
Caustis dioica grows best at temperatures of 60–75°F. Caustis dioica prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
60–75°F
Humidity
50–70%
What Soil Mix Works Best for a Caustis dioica?
Moist, well-draining soil with high organic content. Good drainage is essential for Caustis dioica to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Caustis dioica?
Feed Caustis dioica 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 Caustis dioica?
Repot every 1-2 years in 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 Caustis dioica?
Caustis dioica can be propagated through division, seeds. Similar propagation techniques also apply to whipcord plant care, which shares the same genus.
Is the Caustis dioica Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Caustis dioica, 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 Caustis dioica?
Caustis dioica is susceptible to aphids, scale insects, 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 Caustis dioica Need?
Caustis dioica grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Caustis dioica is native to Western Australia. In cooler regions, grow Caustis dioica as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Caustis dioica 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 Caustis genus — compare its care with other Caustis species on PlantoScan.
Caustis is part of the Cyperaceae plant family — browse all Cyperaceae genera and species.
Caustis dioica copes with lower light than most plants — browse the full list of low-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Caustis dioica R.Br., family Cyperaceae (first published in Prodr. Fl. Nov. Holland. : 239 (1810)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Caustis dioica, 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 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.
Identify Plants Like the
Caustis dioica 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