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Blue Boy Cornflower Seeds and Plants

Short Description

Bachelor's buttons in charming blue.

Full Description

Exquisite, fragrant, well-doubled, flowers bloom from early summer until frost. Fine for cutting and border display. GARDEN HINTS: For earlier bloom, start seeds indoors 6-8 weeks before outdoor planting time. Remove faded flowers to encourage continuous bloom. Cultivate or mulch to control weeds.
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Order: 1 Pkt. (150 seeds)
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Product properties

Sun The amount of sunlight this product needs daily in order to perform well in the garden. Full sun means 6 hours of direct sun per day; partial sun means 2-4 hours of direct sun per day; shade means little or no direct sun.

Full Sun

Height The typical height of this product at maturity.

30 inches

Spread The width of the plant at maturity.

10-12 inches

Ornamental Use Ways in which the product may be used in the garden for ornamental effect.

Borders, Cut Flowers

Life Cycle This refers to whether a plant is an annual, biennial or perennial. Annuals complete their life cycles in one year; biennials produce foliage the first year and bloom and go to seed the second year; perennials can live for more than two years.


Sow Method This refers to whether the seed should be sown early indoors and the seedlings transplanted outside later, or if the seed should be sown directly in the garden at the recommended planting time.

Direct Sow

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  • Cornflower

    Start Indoors Start Indoors Starting seeds indoors is called Indoor Sow or Indirect Sow and these dates are when to sow seeds indoors in the spring or summer
    Transplant Transplant When to transplant bulbs or roots in the garden for spring
    Start Outdoors Start Outdoors Starting seeds outdoors is called Outdoor Sow or Direct Sow and these dates are when to sow seeds outdoors in the spring or summer
    Start Indoors Fall Start Indoors Fall Starting seeds indoors in the fall called Indoor Sow or Indirect Sow and these dates are when to sow seeds outdoors in the fall
    Transplant Fall Transplant Fall Transplant Fall-When to transplant bulbs or roots in the garden for fall
    Start Outdoors Fall Start Outdoors Fall Starting seeds outdoors in the fall is called Outdoor Sow or Direct Sow and these dates are when to sow seeds outdoors in the fall
    First Date: Mar-21 - Last Date: Apr-04
    First Date: May-02 - Last Date: May-16

Cornflower seed should be sown directly in the garden after frost.

  • Direct sow in average soil in full sun after danger of heavy frost.
  • Select a location in full to part shade with good rich well-drained organic soil protected from wind.
  • Prepare the bed by turning the soil under to a depth of 8 inches. Level with a rake to remove clumps of grass and stones.
  • Most plants respond well to soils amended with organic matter. Compost is a wonderful form of organic matter with a good balance of nutrients and an ideal pH level, it can be added to your planting area at any time. If compost is not available, top dress the soil after planting with 1-2 inches of organic mulch, which will begin to breakdown into compost. After the growing season, a soil test will indicate what soil amendments are needed for the following season.
  • Sow seeds evenly and cover with ½ inch of fine soil.
  • Firm soil lightly, water and keep evenly moist.
  • Seedlings will emerge in 7-10 days.
  • Thin plants to stand 12 inches when seedlings are 1 inch high.
  • Keep weeds under control during the growing season. Weeds compete with plants for water, space and nutrients, so control them by either cultivating often or use a mulch to prevent their seeds from germinating. 
  • Mulches also help retain soil moisture and maintain even soil temperatures. For annuals an organic mulch of shredded leaves lends a natural look to the bed and will improve the soil as it breaks down in time. Always keep mulches off a plant’s stems to prevent possible rot.
  • Keep soil evenly moist but not wet. Plants are drought tolerant, but watering during dry spells will improve flowering
  • After plants are about 6 inches tall, a light fertilizer may be applied. Keep granular fertilizers away from the plant crown and foliage to avoid burn injury. Use low rates of a slow release fertilizer, as higher rates may encourage root rots.
  • Taller varieties may require staking
  • Monitor for pests and diseases. Check with your local Cooperative Extension Service for pest controls recommended for your area.
  • Remove plants after they are killed by heavy frost in fall to avoid disease issues the following year.
  • Cornflowers are drought-tolerant and easy to grow. It is a great flower to introduce children to gardening. Deadhead cornflowers to keep them flowering.
  • Cornflowers are perfect for cutting and drying, and they make a great addition to any cottage garden, wildflower meadow, or border. Dwarf cultivars are good for edgings and containers.
  • Cornflowers are short season bloomers so to extend their flowering season plant a second crop two weeks later.
Full Sun
30 inches
10-12 inches
Ornamental Use
Borders, Cut Flowers
Life Cycle
Sow Method
Direct Sow
Bloom Duration
8 weeks
Flower color
Cornflower, Blue Boy is rated 4.4 out of 5 by 7.
Rated 2 out of 5 by from Droopy These came up late and each stem definitely needs staking otherwise it is a droopy tangle with top-heavy flowers on the ground.
Date published: 2018-02-17
Rated 5 out of 5 by from Beautiful blue! I was SO excited to try these out! I threw the seeds along with a wildflower mix in my front yard and had several come up. I'm afraid the darned quail ate most of them, but the ones that grew are beautiful. I keep clipping off the spent flowers and more keep budding. They are exactly what I was hoping for and I'm definitely throwing more seeds next year. Now if I can just figure out how to outsmart the quail...
Date published: 2016-08-22
Rated 5 out of 5 by from True Blue If you are looking for a true blue cornflower (bachelor's button) look no further. The color of this one will delight you! It makes beautiful stand alone bouquets (nothing else is needed!) It will remind you of the blue patterned china in your Grandma's cupboard.....that is the best way I can describe it to you! it's awesome!
Date published: 2014-09-18
Rated 4 out of 5 by from disappointed Your packages do not have the beautiful photos of flowers that appear on line. I was going to give a selection of them for aMother's Day present, but the packages were colorless and plain. Very disappointed when my order arrived!
Date published: 2012-05-09
Rated 5 out of 5 by from Cornflower blueboy Very easy to grow and so pretty to look at. I started mine indoors and all went well. I mixed the plants with other colors and the blue/purple blended in with every thing. Blooms well into September here in zone 3. A must have for every gardener
Date published: 2010-04-11
Rated 5 out of 5 by from Lovely Blues Started some from seed last season, and they started bloom really early. They would have looked better if i kept up with cutting the dead heads off. They can endure colder temperatures than I thought possible. They started to seed themselves later summer, and some came up before November. This December had a few mornings at 0 F and snow covering the ground for a good 6-8 weeks. They are still alive in mid February. They did have a nice scent throughout the summer. I will definitely be growing them again this year!
Date published: 2010-02-16
Rated 5 out of 5 by from Delicate and Whispy As always these are a welcome flower in my gardens. They bloom early and all summer long, as long as you keep them dead-headed. They readily reseed themselves if you allow them to, giving you a show the next year. They look great with any combination of flowers in the garden and cut arrangements. They are very easy to start from seed in the garden, and require minimum attention besides dead-heading.
Date published: 2009-03-07
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