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Also known as
Cornflower, Cornflower, Bachelor's button and Cornflower - blue ball
Taxonomy
Centaurea cyanus
Centaurea
Asteraceae
Asterales

How to care for Centaurea Cyanus

How often to water your Centaurea Cyanus

every 9
Centaurea Cyanus needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot.
Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Water 0.5 cups every
9

Check the growing potential in your area
A plant's growing potential is determined from its location, the time of year, and current local weather.

Select a city to check sunlight intensity

Finding light for Cornflower in your home

a window
Centaurea Cyanus love being close to bright, sunny windows 😎.
Place it less than 1ft from a south-facing window to maximize the potential for growth.
Centaurea Cyanus does not tolerate low-light 🚫.
Select your region to see how the current weather in your area affects the placement of Centaurea Cyanus in your home 🏡.

How to fertilize Centaurea Cyanus

Most potting soils come with ample nutrients which plants use to produce new growth.
By the time your plant has depleted the nutrients in its soil it’s likely grown enough to need a larger pot anyway.
To replenish this plant's nutrients, repot your Centaurea Cyanus after it doubles in size or once a year—whichever comes first.

Centaurea Cyanus can be challenging to care for, according to some plant parents. Check out the reviews down below to learn from their experiences!
Water Needs
Centaurea Cyanus prefers for the soil to dry out between waterings and should be watered regularly. Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Sunlight Needs
Centaurea Cyanus requires abundant, bright and direct light. Place it less than one foot from a window to ensure it receives enough light to survive 💪. Select your region to see how the current weather in your area affects the placement in your home 🏡.
Toxicity
Centaurea Cyanus is not known to cause harm to humans or pets. Regardless, if you, a family member, a cat, or dog has ingested any plant material, please consult a doctor or a veterinarian.
Soil
Centaurea Cyanus does best in well-draining soil. A good soil will contain lots of organic matter such as coco coir as well as perlite or vermiculite to help with drainage. Adding a handful of perlite to regular store-bought potting soil should do the trick!
Fertilizer
Centaurea Cyanus should be repotted after it doubles in size or once a year, whichever comes first. Fresh potting soil has all the nutrients your plant needs, so as long as it’s refreshed yearly, you shouldn’t need to use fertilizer. Remember, plants get their energy from sunlight, not fertilizer!
Growth Pattern
Centaurea Cyanus grows vertically and new growth will emerge from the top of the plant.
Growing Outdoors
USDA Hardiness Zone
Centaurea Cyanus can be grown outdoors in USDA Hardiness Zones 2a-11b. Find your local hardiness zone here.
Propagation
The seeds of Centaurea Cyanus can be used to grow new plants! After your plant flowers, any seeds that formed can be collected and germinated in potting soil.
Care Summary for Centaurea Cyanus
Centaurea Cyanus
Greg recommends:

0.5 cups every 9 days

< 1ft from a window

Repot after 2x growth
Based on the 4” pot your plant is in, and that it doesn’t get direct sunlight.
