Cornflower 'Blue Ball'

Centaurea cyanus

How to grow Cornflower 'Blue Ball'

  • Partial Sun

  • Medium

Deadhead spent blooms to prolong flowering in summer but leave some to develop seeds towards autumn as these would provide food for the birds.1

Try to plant in a location that enjoys partial sun and remember to water moderately. Keep in mind when planting that Blue Ball is thought of as half hardy, so remember to watch your frost dates and ensure you have this plant protected when the temperature dips.

Growing Blue Ball from seed

Ensure a distance of 0.98 inches (2.5 cm) between seeds when sowing - look to sow at a depth of approximately 0.23 inches (0.6 cm).

By our calculations, you should look at sowing Blue Ball about 7 days after your last frost date.

Transplanting Blue Ball

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Blue Ball is a half hardy plant.

Harvesting Blue Ball