Blue Stars Plant Care
Caesia calliantha R.J.F.Hend.
Updated · Sources · How we source care data
Caesia calliantha, commonly known as the blue grass lily or blue star lily, is a species of herbaceous flowering plant. It is a member of the Asphodelaceae family, subfamily Hemerocallidoideae, native to Australia found predominantly along the East coast in Victoria, New South Wales, South Australia and Tasmania.
Every 10–14 days
Bright indirect light
65–80°F
40–60%
At a glance
How do you care for Blue Stars?
Water Blue Stars every 10–14 days, letting the top layer of soil dry out between waterings, and give it bright indirect light. It prefers temperatures of 65–80°F (18–27°C) and 40–60% humidity. Fertilize it every 6 months during the growing season.
Where Is the Blue Stars Native To?
What Is the Blue Stars?
Blue Stars (Caesia calliantha) belongs to the Asphodelaceae family within the Caesia genus. Blue Stars is native to Australia found predominantly along the East coast in Victoria, New South Wales, South Australia and Tasmania. Blue Stars is also known as Tall Caesia.
Blue Stars displays a clumping perennial herb growth habit, reaching up to 1.5 ft tall with a spread of approximately 1 ft. Blue Stars produces small white or pink flowers in clusters on tall stalks.
Leaf size: approximately 6 inches.
How Often Should You Water a Blue Stars?
Caesia calliantha requires watering every 10–14 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 10–14 days
Let soil partially dry between waterings
What Light Does the Blue Stars Need?
Blue Stars thrives in bright indirect light. Avoid placing Blue Stars in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect light
What Temperature and Humidity Does the Blue Stars Prefer?
Caesia calliantha grows best at temperatures of 65–80°F. Blue Stars prefers humidity levels of 40–60%.
Temperature
65–80°F
Humidity
40–60%
What Soil Mix Works Best for a Blue Stars?
Well-draining sandy soil mix with added perlite for good aeration. Good drainage is essential for Blue Stars to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Blue Stars?
Feed Blue Stars 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 Blue Stars?
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 Blue Stars?
Blue Stars can be propagated through division of offsets, seeds. Similar propagation techniques also apply to small-flowered caesia plant care, which shares the same genus.
Is the Blue Stars Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Blue Stars, 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 Blue Stars?
Blue Stars is susceptible to mealybugs, spider mites, aphids. 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 Blue Stars Need?
Blue Stars grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. Blue Stars is native to Australia found predominantly along the East coast in Victoria, New South Wales, South Australia and Tasmania. In cooler regions, grow Blue Stars as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13b
Keep exploring plants
Blue Stars 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 Caesia genus — compare its care with other Caesia species on PlantoScan.
Caesia is part of the Asphodelaceae plant family — browse all Asphodelaceae genera and species.
Blue Stars 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: Caesia calliantha R.J.F.Hend., family Asphodelaceae (first published in Fl. Australia 45: 471 (1987)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Blue Stars, 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.
Identify Plants Like the
Blue Stars 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