
Cornflower (Centaurea cyanus)
Photo: TeunSpaans · CC BY-SA 3.0
- Digestive
- 2 conditions
- Licensed photo
Overview
Cornflower (Centaurea cyanus) is an annual or biennial plant reaching about 3 ft (90 cm). It has multiple branching stems, a rosette of lower leaves, and striking sky-blue flower heads that bloom in summer. Historically, cornflower gained a reputation for treating eye conditions (the infusion was strained and used as an eyewash), though modern evidence of its efficacy is limited. It is sometimes used as a mild bitter tonic to support digestion.
Traditional uses & properties
Mildly Bitter & Stimulant: Can improve digestion and possibly support liver function. Slightly Antibiotic: Cnicin, one of its constituents, shows mild antibacterial activity. External Applications: Traditional uses include soothing eye strain, conjunctivitis, and minor skin irritations.
Traditional preparations
Traditional texts describe the preparations below, and where those texts give specific amounts, the amounts are quoted here as part of that record. This is a record of historical practice, not a dosage recommendation - the figures are what the sources say, not what HerbMate tells you to take. Amounts, potency, and safe use vary enormously by preparation, plant part, and person.
Make an infusion and strain. When warm (not hot), put in an eyebath and bathe eyes well. Use no more than twice a day.
Safety & precautions
Potential Irritation: As with any herb, discontinue use if irritation occurs.
Drug & food interactions
Interaction data is not available for this herb - talk to a pharmacist before combining it with any medication. A blank entry here means we have not documented interactions, not that none exist.
Habitat
Native to the Near East, cornflower has spread across temperate regions worldwide. Commonly found in or around cornfields, it grows easily in disturbed soil. The flowers are gathered just after they open in summer.
Traditionally used for
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Frequently asked questions
What is Cornflower (Centaurea cyanus) traditionally used for?
Traditional sources describe Cornflower (Centaurea cyanus) as follows: Mildly Bitter & Stimulant: Can improve digestion and possibly support liver function. Slightly Antibiotic: Cnicin, one of its constituents, shows mild antibacterial activity. External Applications: Traditional uses include soothing eye strain, conjunctivitis, and minor skin irritations.
How is Cornflower (Centaurea cyanus) prepared?
Traditional texts describe the preparations below, and where those texts give specific amounts, the amounts are quoted here as part of that record. This is a record of historical practice, not a dosage recommendation - the figures are what the sources say, not what HerbMate tells you to take. Amounts, potency, and safe use vary enormously by preparation, plant part, and person. Pink Eye: Make an infusion and strain. When warm (not hot), put in an eyebath and bathe eyes well. Use no more than twice a day.
What safety cautions apply to Cornflower (Centaurea cyanus)?
Potential Irritation: As with any herb, discontinue use if irritation occurs.






