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Hudson Valley Seed Co.

Black Button Centaurea

Centaurea cyanus

Conventionally Grown

A striking, dark-maroon cornflower for edible petals and bouquets.

This isn't your classic light blue cornflower; this is its dramatic, moody cousin. 'Black Button' is a stunning variation of the beloved bachelor's button, offering an abundance of double and semi-double blooms in a rich, super-dark maroon that reads as almost black in the garden. The upright plants grow tall, up to 38 inches (and may appreciate a little staking), providing a long season of striking color. They are a classic for a reason: they make a fantastic fresh-cut flower and are also wonderful for drying, holding their deep color beautifully.

The flowers are more than just a pretty face; they're also a delight in the kitchen. The edible petals have a mild floral flavor and make a truly sophisticated garnish for salads, desserts, or cheese platters. As a cool-season lover, this plant is easy to grow and will often self-sow, returning for another show the following year. If you can bear to leave the seed heads, you'll also provide a welcome treat for garden birds.

Unit Price Quantity Availability
100 Seeds $5.39
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Growing instructions
Direct seeding is recommended. Sow seeds 1/4" deep in early spring as soon as soil can be worked, or sow in the fall. Thin seedlings to 6-9" apart. To start indoors, sow 3-4 weeks before planting out. Freezing seeds for 10-14 days prior to indoor sowing can improve germination.
Product Details
Days to Maturity 65-75 days
Days to Germination 7-14 days
Width at Maturity 9"
Height at Maturity 36-40"
Hardiness Zone Range Annual 4 5 6 7 8
Sun Conditions Full Sun (8+ Hours Sun)
Planting Depth ¼"
Row Spacing 12"
Plant Spacing 9"
    Black Button Centaurea flowers with dark purple petals and green foliage, from Hudson Valley Seed Co.
    Black Button Centaurea flower from Hudson Valley Seed Co., showing dark purple petals and green foliage.