Red Boy
Centaurea cyanus 'Red Boy'
Red Boy blooms from May through July.
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Growing Red Boy
Plant it in full sun. It prefers low water. It is hardy in USDA zones 2–11. Expect it to reach about 2.6 ft tall and 12 in wide at maturity, in roughly 1 year.
When to plant Red Boy
Wait until all danger of frost has passed, then plant out Red Boy into warm soil; in most zones that means late spring. Planted then, it flowers from May to July.
Month-by-month timing for your zone is on the planting calendar: for the middle of its range, start with zone 6 in April.
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