Narrow-tube Watsonia Plant Care
Watsonia stenosiphon L.Bolus
Updated · Sources · How we source care data
Watsonia stenosiphon, the small orange watsonia, is a plant belonging to the genus Watsonia and forming part of the fynbos. The species is endemic to the Western Cape.
Every 7–10 days
Full sun to partial shade
50–80°F
40–60%
At a glance
How do you care for Narrow-tube Watsonia?
Water Narrow-tube Watsonia 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 50–80°F (10–27°C) and 40–60% humidity. Fertilize it every 6 months during the growing season.
Where Is the Narrow-tube Watsonia Native To?
What Is the Narrow-tube Watsonia?
Narrow-tube Watsonia (Watsonia stenosiphon) belongs to the Iridaceae family within the Watsonia genus. Narrow-tube Watsonia is native to the Western Cape.
Narrow-tube Watsonia displays an upright, clumping perennial growth habit, reaching up to 3 ft tall with a spread of approximately 1.5 ft. Narrow-tube Watsonia produces showy spikes of tubular flowers in various colors.
Leaf size: approximately 18 inches.
How Often Should You Water a Narrow-tube Watsonia?
Watsonia stenosiphon 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 Narrow-tube Watsonia Need?
Narrow-tube Watsonia thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Narrow-tube Watsonia Prefer?
Watsonia stenosiphon grows best at temperatures of 50–80°F. Narrow-tube Watsonia prefers humidity levels of 40–60%.
Temperature
50–80°F
Humidity
40–60%
What Soil Mix Works Best for a Narrow-tube Watsonia?
Well-draining sandy loam with added compost for nutrients. Good drainage is essential for Narrow-tube Watsonia to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Narrow-tube Watsonia?
Feed Narrow-tube Watsonia 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 Narrow-tube Watsonia?
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 Narrow-tube Watsonia?
Narrow-tube Watsonia can be propagated through division of offsets, seeds. Similar propagation techniques also apply to pink watsonia plant care, which shares the same genus.
Is the Narrow-tube Watsonia Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Narrow-tube Watsonia, 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 Narrow-tube Watsonia?
Narrow-tube Watsonia 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 Narrow-tube Watsonia Need?
Narrow-tube Watsonia grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Narrow-tube Watsonia is native to the Western Cape. In cooler regions, grow Narrow-tube Watsonia as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Narrow-tube Watsonia 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 Watsonia genus — compare its care with other Watsonia species on PlantoScan.
Watsonia is part of the Iridaceae plant family — browse all Iridaceae genera and species.
Narrow-tube Watsonia thrives in bright light and direct sun — see other bright-light plants.
More Watsonia Species
Other Watsonia species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Watsonia stenosiphon L.Bolus, family Iridaceae (first published in Ann. Bolus Herb. 4: 46 (1926)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Narrow-tube Watsonia, 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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