April Sow Together Video
Please note - although some of these seeds can be direct sown into the ground, I ALWAYS start some off under cover too - personally I don't have much luck with sowing into the ground, but that could just be me! So try both and see what works best for you in terms of the under cover space you have available, the time you have to molly-coddle your seeds when starting them under cover (!) and your climate and personal preference.
Start under cover between late March and May by sprinkling onto surface of compost and covering lightly. Prick out when first two true leaves appear.
Alternatively, direct sow onto soil from March to June and thin to final spacing when a few cm tall. Will need staking.
Final Spacing: 30cm
Pinch: Yes when 20cm tall
Position: Full sun
Harvest: Flowers July-October. Cut and deadhead to encourage more flowers.
And a full growing-guide can also be found here: https://thefloralproject.co.uk/blogs/news/how-to-grow-cosmos