You can either sow them directly where you plan to grow them or in a pot or seed tray. I tend to sow in a tray and cover them before placing them outside, if I sow in a pot outside the lovely black birds like to ferret around in the soil and disturb the seedlings.
Cornflower Seeds - sprinkle on top of soil
Rake over your soil, or if growing in a pot or tray fill with compost. Water the compost, it is best to sow your seeds onto wet/damp compost. Sprinkle the seeds onto the top of the soil, as shown in the photo above.Cornflower Seeds - sown and ready to grow
Then sprinkle a very light covering of compost so that you can just about still see the seeds, as shown in the photo above.Put them some where sheltered but sunny in the garden, I will keep mine in my unheated greenhouse. You should begin to see seedling between 2-3 weeks, make sure you keep them watered. In around 6-7 weeks you can plant the seedling into their final location. I have never failed to grow Cornflowers using this method. Dwarf Cornflowers grow to 30 cms in height.Having failed at taking a photograph of my Cornflower display last year as I had intended too, I have set myself a reminder in my calender to do so. Happy seed sowing!