Skip to product information
1 of 6

Quick Info

Cold Winters

March - May

Mild Winters

October - April

Sun/Shade

Full sun

Sow Seeds

1 - 2 inches apart 1/2 inch deep

Days to Germinate

7 - 10 days

Mature Height

3 - 3½ feet

Heirloom Cornflowers

Blue Boy

Blue Boy

(Centaurea cyanus)

Skip to product information
1 of 6

Quick Info

Cold Winters

March - May

Mild Winters

October - April

Sun/Shade

Full sun

Sow Seeds

1 - 2 inches apart 1/2 inch deep

Days to Germinate

7 - 10 days

Mature Height

3 - 3½ feet

(Centaurea cyanus)
These classic flowers enjoy a very special place in the hearts of all cottage garden lovers. Their 1½-inch thistle-shaped blossoms are a brilliant electric-blue color that rivets the eye. Colorful and showy in the spring garden, Blue Boy makes a stunning landscape display and equally arresting bouquets to enjoy indoors. These are beautiful old-fashioned flowers to enjoy on their own or to interplant lavishly with other spring flowers.

Seed Count: Approx. 100 / Weight: 500 mg

Regular price $ 2.99
Regular price Sale price $ 2.99
Sale Sold out

 -  SKU:5288

Special Features

renees garden heirloom feature renees garden butterfly feature renees garden hummingbird feature renees garden pollinator feature

Quick Info

Cold Winters

March - May

Mild Winters

October - April

Sun/Shade

Full sun

Sow Seeds

1 - 2 inches apart 1/2 inch deep

Days to Germinate

7 - 10 days

Mature Height

3 - 3½ feet

View full details

Collapsible content

GROWING INSTRUCTIONS

HARDY ANNUAL

Spring/summer bloom
Can handle light frost

TO START OUTDOORS

Sow seeds in a finely textured garden bed in full sun as soon as soil can be worked. In mild winter areas, where the ground doesn’t freeze, plant in fall for next spring’s bloom. Space seeds 1 to 2 inches apart and cover 1/2 inch deep. Keep seed bed moist until seedlings emerge in 7 to 10 days. Weed and water carefully. Thin seedlings to 6 to 8 inches apart.

TO START EARLY INDOORS

Sow seeds 1 to 2 inches apart in a container of seed starting mix, 2 or 3 weeks before last expected frost. Cover 1/2 inch deep, keep moist and provide a good light source until seedlings are transplanted outside. Plant 6 to 8 inches apart into fertile garden soil in full sun when plants are 3 to 4 inches tall. Seedlings grow quickly; plant out before the roots get crowded.

GROWING NOTES

In mild winter areas the best cornflowers (aka Bachelor Buttons) result from seeds sown in fall to bloom the next spring. In cold winter areas where ground freezes, plant in early spring to get sturdy plants that will flower for many weeks if faded blossoms are removed.