United States Edition

Cornflower 'Red Boy'

Centaurea cyanus

Red Boy is part of the Centaurea genus and is a Cornflower variety. Its scientific name is Centaurea cyanus 'Red Boy'. This variety is an Flower that typically grows as an Annual, which is defined as a plant that matures and completes its lifecycle over the course of a single year. Red Boy normally grows to a mature height of 90.0 cm (that's 2.93 feet imperial).

Red Boy Cornflower is normally quite a low maintenance plant and is normally very easy to grow - great for beginner gardeners!

This plant info is provided by the myfolia gardener's wiki. All details about Cornflower 'Red Boy' have been kindly provided by our members.

How to grow Cornflower 'Red Boy'

  • Partial Sun

    +
  • Medium

Try to plant in a location that enjoys partial sun and remember to water moderately. Keep in mind when planting that Red Boy is thought of as half hardy, so remember to protect this plant from frosts and low temperatures. The USDA Hardiness Zones typically associated with Red Boy are Zone 6 and Zone 11.

Growing Red Boy from seed

Try to aim for a seed spacing of at least 0.98 inches (2.5 cm) and sow at a depth of around 0.23 inches (0.6 cm).

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

Transplanting Red Boy

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

Harvesting Red Boy

Cornflower 'Red Boy' information

How long does Red Boy take to grow?

These estimates for how long Cornflower 'Red Boy' takes to sprout, grow and harvest are from real observations from real gardeners, right around the world. Start logging and journaling your observations to participate!

When should I sow Red Boy?

Folia's when to plant Cornflower 'Red Boy' estimates are relative to your last frost date. Enter your frost dates and we'll calculate your sowing and planting dates for you!

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