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Florist Blue Boy Centaurea

4 reviews

Also known as Bachelor’s Buttons or Cornflower. A native of Europe, they were brought to America in the17th century and have been loved by gardeners for their periwinkle blue flowers since. Tuck them among annuals, perennials, or even in the veggie garden where the intense blue flowers can be used for cutting or for an edible garnish. The 1-2” blue flowers bloom nonstop, attracting beneficial from midsummer on.     

100 seeds



Centaurea cyanus


Germination: 7-14 days

Seed Planting Depth: Sow 1/8” deep 

Starting Indoors:  Start indoors 4-6 weeks before the last frost. Provide 60-70ºF soil temperature. Water seedlings regularly until established. 

Sowing Outdoors: Direct sow mid to late spring into early summer.  Sow a few seeds every 4-6".

Spacing: Transplant 4-8" apart

Growth Habit: Upright

Height and Width: 10-12" x 36-40"

Light Needs:  Full sun 

Soil Needs:  Average, well-drained

Approximate days to flower from seed: 65-75 days

Uses: Flower beds, cottage and wildflower gardens, attracts pollinators and birds, deer and drought tolerant, cut flowers , edible flowers

Care: Self-seeds. Deadhead to prevent self-seeding. Established plants can tolerate dry soil, but regular water will keep the plants healthier. Do not over-fertilize, causes excessive leaf growth and little to no flowers.


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Customer Reviews
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United States United States
I recommend this product
Bachelor buttons

They are doing well but not lush. I suspect that is due to my less than green thumb. Along the same vein, the spinach I ordered didn’t yield anything to speak of. My learning curve for the peppers and tomatoes was steep. They didn’t get an early enough start and currently are about 4” tall. I’ve got some left and will start them at a more appropriate date next year. Live and learn!! Thanks for asking and stay healthy! mary

Steven C.
United States United States
I recommend this product
Florists blue boy centaurea

The seeds germinated quickly and were as labeled on the packet. Pinetree Seeds came through for me and they kept me informed about COVID related delays. The seeds were fresh and good quality so that the delayed plantings were offset by the fast germination. I would definitely order from Pinetree Seeds again. They have consistently good selection and quality.

Pinetree Garden Seeds Florist Blue Boy Centaurea Review
Carol M.
United States United States
Satisfaction with Seeds

Strong plants and beautiful blooms!

Barbara S.
United States
Florist Blue Boy

Seeds germinated on schedule about 95% germination rate. About 4" tall right now and nice looking plant.