Achillea Cerise Queen
March to late May under glass at 18-21°C (65-70°F) Germinates in 10-15days. when seedlings are large enough to handle, prick off into pots and grow on. Gradually harden off and plant out in September or October, spacing 30cm (12') apart for flowering the following summer.
All summer in the first year when grown under high light levels.