Plumbago Hyacinth Plant Care
Merwilla plumbea (Lindl.) Speta
Updated · Sources · How we source care data
Merwilla plumbea, also known as the blue squill, is a perennial, bulb-forming herb in the small genus Merwilla of the family Asparagaceae. It is endemic to the Drakensberg.
Every 7–14 days
Bright indirect light
65–75°F
40–60%
At a glance
How do you care for Plumbago Hyacinth?
Water Plumbago Hyacinth every 7–14 days, letting the top layer of soil dry out between waterings, and give it bright indirect light. It prefers temperatures of 65–75°F (18–24°C) and 40–60% humidity. Fertilize it every 6 months during the growing season.
What Is the Plumbago Hyacinth?
Plumbago Hyacinth (Merwilla plumbea) belongs to the Asparagaceae family within the Merwilla genus. Plumbago Hyacinth is native to the Drakensberg. Plumbago Hyacinth is also known as Blue Hottentot Bride, Cape Hyacinth.
Plumbago Hyacinth displays a clumping perennial growth habit, reaching up to 1.5 ft tall with a spread of approximately 1 ft. Plumbago Hyacinth produces bell-shaped flowers in shades of blue, purple, or white.
Leaf size: approximately 12 inches.
How Often Should You Water a Plumbago Hyacinth?
Merwilla plumbea requires watering every 7–14 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 7–14 days
Let soil partially dry between waterings
What Light Does the Plumbago Hyacinth Need?
Plumbago Hyacinth thrives in bright indirect light. Avoid placing Plumbago Hyacinth in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect light
What Temperature and Humidity Does the Plumbago Hyacinth Prefer?
Merwilla plumbea grows best at temperatures of 65–75°F. Plumbago Hyacinth prefers humidity levels of 40–60%.
Temperature
65–75°F
Humidity
40–60%
What Soil Mix Works Best for a Plumbago Hyacinth?
Well-draining sandy soil mix with added organic matter. Good drainage is essential for Plumbago Hyacinth to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Plumbago Hyacinth?
Feed Plumbago Hyacinth 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 Plumbago Hyacinth?
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 Plumbago Hyacinth?
Plumbago Hyacinth can be propagated through offsets, seeds.
Is the Plumbago Hyacinth Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Plumbago Hyacinth, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
Toxic to pets.
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 Plumbago Hyacinth?
Plumbago Hyacinth is susceptible to spider mites, mealybugs. 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 Plumbago Hyacinth Need?
Plumbago Hyacinth grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. Plumbago Hyacinth is native to the Drakensberg. In cooler regions, grow Plumbago Hyacinth as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13b
Keep exploring plants
Plumbago Hyacinth 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 Merwilla genus — compare its care with other Merwilla species on PlantoScan.
Merwilla is part of the Asparagaceae plant family — browse all Asparagaceae genera and species.
Plumbago Hyacinth 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: Merwilla plumbea (Lindl.) Speta, family Asparagaceae (first published in Phyton (Horn) 38: 109 (1998)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Plumbago Hyacinth, 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 13b, 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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