Cornflower ‘Blue Ball’
Centaurea cyanus · Flower · No. 46
- Sow under cover
- —
- Sow outdoors
- Mar–May, Sep
- Flowers
- Jun–Sep
- Germination
- 7–14 days
- Spacing
- 30 cm in the row, 30 cm between rows
- Days to flower
- 65–80 from sowing
- Sun
- Full sun
- Seed saving
- Moderate
| J | F | M | A | M | J | J | A | S | O | N | D | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Outdoors | March | April | May | September | ||||||||
| Flowers | June | July | August | September |
Notes
Blue, 90 cm. Autumn sowings flower earlier and stand taller.
Saving seed · Moderate
Insects cross it with other varieties. Grow one variety, isolate, or bag and hand-pollinate.
- Grow one variety of this plant, or keep 50 m from others.
- Or bag three flowers before they open and hand-pollinate.
- Leave the seed to ripen fully, then dry 7–14 days.