Photo: no rights reservedCC0 1.0via iNaturalist
Rusty tube rush Plant Care
Syringodea derustensis M.P.de Vos
Updated · Sources · How we source care data
This unique plant's elongated, sword-shaped green leaves with red margins make it stand out in any collection. Originating from the dry regions of Madagascar, Syringodea derustensis is highly sought after by plant collectors for its striking appearance and low maintenance requirements. Its unusual shape and coloration add an exotic touch to any indoor garden.
Every 7–10 days
Full sun to partial shade
60–80°F
40–70%
At a glance
How do you care for Rusty tube rush?
Water Rusty tube rush 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.
Where Is the Rusty tube rush Native To?
What Is the Rusty tube rush?
Rusty tube rush (Syringodea derustensis) belongs to the Iridaceae family within the Syringodea genus. Rusty tube rush is native to the Western Cape and occurs in the Klein Karoo, from Oudtshoorn to De Rust. Rusty tube rush is also known as Rusty syringodea, Red stem bulrush.
Rusty tube rush displays a clumping perennial herb growth habit, reaching up to 1.5 ft tall with a spread of approximately 1 ft. Rusty tube rush produces showy tubular flowers in various colors.
Leaf size: approximately 12 inches.
How Often Should You Water a Rusty tube rush?
Syringodea derustensis 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 Rusty tube rush Need?
Rusty tube rush thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Rusty tube rush Prefer?
Syringodea derustensis grows best at temperatures of 60–80°F. Rusty tube rush prefers humidity levels of 40–70%.
Temperature
60–80°F
Humidity
40–70%
What Soil Mix Works Best for a Rusty tube rush?
Well-draining sandy loam with added organic matter. Good drainage is essential for Rusty tube rush to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Rusty tube rush?
Feed Rusty tube rush 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 Rusty tube rush?
Repot every 2-3 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 Rusty tube rush?
Rusty tube rush can be propagated through division of rhizomes, offsets. Similar propagation techniques also apply to snake plant plant care, which shares the same genus.
Is the Rusty tube rush Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Rusty tube rush, 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 Rusty tube rush?
Rusty tube rush 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 Rusty tube rush Need?
Rusty tube rush grows outdoors in USDA Zone 9a – 10b. It survives winters down to planting zone 9a. Rusty tube rush is native to the Western Cape and occurs in the Klein Karoo, from Oudtshoorn to De Rust. In cooler regions, grow Rusty tube rush as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 9a – 10b
Keep exploring plants
Rusty tube rush 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 Syringodea genus — compare its care with other Syringodea species on PlantoScan.
Syringodea is part of the Iridaceae plant family — browse all Iridaceae genera and species.
Rusty tube rush 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: Syringodea derustensis M.P.de Vos, family Iridaceae (first published in J. S. African Bot. 40: 245 (1974)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Rusty tube rush, 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 9a – 10b, 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.
Identify Plants Like the
Rusty tube rush 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