Last year, I was determined to master the art of growing these lovely chaps, as in previous years, they all went wrong, or got lost in the general tumble of the garden, and even got hoed one year!
So I tried a sowing in a bucket (holed), and got a reasonable result, but when some space in the GH cropped up, I spread just eight or ten seeds on the surface of a normal 4" pot, covered them lightly and they just loved it there! Several more pots followed, and while the 'bucket' lot did just OK, the ones in the 'reserved box seats' did wonderfully!
It was also useful to take up any later cleared space on the garden patch, by just trowelling a hole and popping them in later, where they seemed to thrive even more! There are still some out there too! I really don't understand why they did so well!
Noting a chum's comment about onion seeds on another post, I must try this again pretty soon, because these chaps cost about 7p each in Twongos, which is ridiculous really...