Photo: en:User:Saranphat.chaCC BY-SA 3.0via Wikimedia Commonsresized / cropped
Mountain Cornflower Plant Care
Cyanus montanus Hill
Updated · Sources · How we source care data
Cyanus montanus is easily recognized by its slender, deeply lobed leaves that are a striking silvery-grey color. Originating from the mountain regions of Europe, this plant is highly sought after by collectors for its unique foliage and delicate blue flowers that bloom in the summer months.
Every 3–5 days
<Write how much light plant "Cyanus montanus" needs per day but only write the output value in just integer>
60–80°F
40–60%
At a glance
How do you care for Mountain Cornflower?
Water Mountain Cornflower every 3–5 days, letting the top layer of soil dry out between waterings, and give it <write how much light plant "cyanus montanus" needs per day but only write the output value in just integer>. It prefers temperatures of 60–80°F (16–27°C) and 40–60% humidity. Fertilize it every 2 months during the growing season.
Where Is the Mountain Cornflower Native To?
- Albania
- Austria
- Belarus
- Belgium
- Bosnia and Herzegovina
- Bulgaria
- Croatia
- Cyprus
- Czechia
- Denmark
- Estonia
- Finland
- France
- Germany
- Greece
- Hungary
- Iceland
- Ireland
- Italy
- Latvia
- Lithuania
- Luxembourg
- Malta
- Moldova
- Montenegro
- North Macedonia
- Norway
- Poland
- Portugal
- Romania
- Russia
- Serbia
- Slovakia
- Slovenia
- Spain
- Sweden
- Switzerland
- The Netherlands
- Ukraine
- United Kingdom
What Is the Mountain Cornflower?
Mountain Cornflower (Cyanus montanus) belongs to the Asteraceae family within the Cyanus genus. Mountain Cornflower is native to Europe. Mountain Cornflower is also known as Mountain Bluet, Centaurea angustifolia, Centaurea carpathica.
Mountain Cornflower displays an upright, branching annual growth habit, reaching up to 2 ft tall with a spread of approximately 1 ft. Mountain Cornflower produces bright blue, pink, or white disc florets in a spiky, thistle-like flower head.
Leaf size: approximately 3 inches.
How Often Should You Water a Mountain Cornflower?
Cyanus montanus requires watering every 3–5 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 3–5 days
Let soil partially dry between waterings
What Light Does the Mountain Cornflower Need?
Mountain Cornflower thrives in <write how much light plant "cyanus montanus" needs per day but only write the output value in just integer>.
Light Requirement
<Write how much light plant "Cyanus montanus" needs per day but only write the output value in just integer>
What Temperature and Humidity Does the Mountain Cornflower Prefer?
Cyanus montanus grows best at temperatures of 60–80°F. Mountain Cornflower prefers humidity levels of 40–60%.
Temperature
60–80°F
Humidity
40–60%
What Soil Mix Works Best for a Mountain Cornflower?
Well-draining sandy loam with added organic matter. Good drainage is essential for Mountain Cornflower to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Mountain Cornflower?
Feed Mountain 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 Mountain Cornflower?
Not applicable (annual plant). 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 Mountain Cornflower?
Mountain Cornflower can be propagated through seeds.
Is the Mountain Cornflower Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Mountain 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 Mountain Cornflower?
Mountain Cornflower is susceptible to aphids, caterpillars, thrips. 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 Mountain Cornflower Need?
Mountain Cornflower grows outdoors in USDA Zone 3a – 8b. It survives winters down to planting zone 3a. Mountain Cornflower is native to Europe.
Hardiness Zone
Zone 3a – 8b
Keep exploring plants
Mountain 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 Cyanus genus (family Asteraceae) — search all Cyanus species in the plant lookup.
Mountain 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: Cyanus montanus Hill, family Asteraceae (first published in Hort. Kew. : 64) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Mountain 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: en:User:Saranphat.cha, 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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