When to Plant Centaurea Seeds?

According to the National Garden Bureau, you can sow annual centaureas outdoors in late September in mild winter areas; they will start to grow before the first fall frost (if any) and will bloom earlier the following spring. In colder zones, sow seeds in early spring as soon as the ground can be worked.

How do you grow Centaurea from seed?

SOWING: Direct seed (recommended): Sow seeds thinly in rows, 6 seeds per foot, 1/4" deep, as soon as soil can be worked. Cover lightly. Keep soil surface moist until emergence. When seedlings have first true leaves, thin to 6-9" apart.

How do you plant Centaurea?

Propagating Centaurea

Sow seeds of annuals from March to May or in September for flowering the following year. Divide perennials in autumn or spring. Take cuttings of tender perennials in late summer and over winter young plants under glass. Plant out in late spring once frosts have passed.