How Do You Grow Cornflowers. The best site is a moderately sheltered one in full sun or partial shade. Sowing cornflowers in cells or plugs is a good method if adding them to a wildflower area.
If you plant cornflower seeds between March and May then you will be treated to a lovely display between June and September. Sow cornflowers from early to mid spring for early summer bloom. Cornflowers are grown from seed planted in the spring and they are best sown direct into the soil in which they are to grow.
You should sow cornflower plants from March until May meaning they will flower from June to September.
Sow seeds from March to May outdoors for flowers from June to September or sow during August and September to flower slightly earlier the following year. You should sow cornflower plants from March until May meaning they will flower from June to September. For springsummer growth the seeds need 85 to 95 days to reach flowering maturity. 02062021 Keep the seedbed moist until germination occurs usually within 10 days in warm temperatures.