Photo: User:CarstorCC BY-SA 3.0via Wikimedia Commonsresized / cropped
White Cornflower Plant Care
Psephellus dealbatus K.Koch
Updated · Sources · How we source care data
Psephellus dealbatus is a striking plant known for its silvery-white foliage that forms a dense mound of leaves, giving it a distinctive appearance in any garden. Originating from the rocky slopes and meadows of Turkey, this plant is popular among enthusiasts for its unique color and texture.
Every 7–14 days
Full sun to partial shade
50–75°F
40–60%
At a glance
How do you care for White Cornflower?
Water White Cornflower every 7–14 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–75°F (10–24°C) and 40–60% humidity. Fertilize it every 2 months during the growing season.
Where Is the White Cornflower Native To?
What Is the White Cornflower?
White Cornflower (Psephellus dealbatus) belongs to the Asteraceae family within the Psephellus genus. White Cornflower is native to the Caucasus Mountains and Turkey. White Cornflower is also known as Persian Cornflower, Centaurea baksanica, Centaurea cabardensis.
White Cornflower displays a low rosette, clumping habit growth habit, reaching up to tall with a spread of approximately 1 ft. White Cornflower produces small daisy-like flowers in shades of yellow, white, or pink.
Leaf size: approximately 4 inches.
How Often Should You Water a White Cornflower?
Psephellus dealbatus 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 White Cornflower Need?
White Cornflower thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the White Cornflower Prefer?
Psephellus dealbatus grows best at temperatures of 50–75°F. White Cornflower prefers humidity levels of 40–60%.
Temperature
50–75°F
Humidity
40–60%
What Soil Mix Works Best for a White Cornflower?
Well-draining sandy loam with added perlite for improved drainage. Good drainage is essential for White Cornflower to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a White Cornflower?
Feed White Cornflower every 2 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 2 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 White Cornflower?
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 White Cornflower?
White Cornflower can be propagated through seeds, division of clumps. Similar propagation techniques also apply to beautiful psephellus plant care, which shares the same genus.
Is the White Cornflower Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list White Cornflower, 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 White Cornflower?
White Cornflower is susceptible to aphids, spider mites, whiteflies. 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 White Cornflower Need?
White Cornflower grows outdoors in USDA Zone 3a – 8b. It survives winters down to planting zone 3a. White Cornflower is native to the Caucasus Mountains and Turkey.
Hardiness Zone
Zone 3a – 8b
Keep exploring plants
White Cornflower 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 Psephellus genus — compare its care with other Psephellus species on PlantoScan.
Psephellus is part of the Asteraceae plant family — browse all Asteraceae genera and species.
White Cornflower 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: Psephellus dealbatus K.Koch, family Asteraceae (first published in Linnaea 24: 438 (1851)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list White Cornflower, 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: User:Carstor, CC BY-SA 3.0, Wikimedia Commons — original.
- Hardiness zone: USDA Zone 3a – 8b, 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.
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