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Centaurea Common name; Cornflower
 
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montana

cyanus

Coldframe

Compost

Deadheading

Division

Heating

Planting out

Pricking out

Seed sowing

The annual species cyanus will grow to around 300mm (12") high and the perennial montana to around 50-600mm (18"-24") high.

Grow centaurea in any fertile, well-drained garden soil, in a sunny position.

Dead-heading is recommended for both species to prolong the flowering period.

Week 14; Sow seeds in pots or trays of seed compost and germinate 18°C (64°F)

Germination should take around four to five days.

Week 16; When seedlings are large enough to handle prick out into pots/tray or boxes of potting compost and grow on in a cold frame until planting out time.

Week 21; Plant out cyanus 300 (12") apart.

Week 40; Plant out montana 300 (12") apart.

Established plants of montana can be divided and planted out immediately at this time.

 

 

 

 

 

 

 

 

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