[Aidy]

Personally I like to be fiddly

I pre-chit my seed (damp kitchen paper in a zip bag) and then sow once chitted into 13cm deep root trainer's.
I feed with seaweed extract then when ready transplant.
Leeks I sow three times a year. An early row (30 leeks), mid season and then a late row once my peas are up. We do tend to eat a lot of them from autumn through winter and I still have around 15 ish on the plot now.

(Edit: Forgot to mention, Musscleborough is the variety and I allow one to go seed and save them for the following year)

[Snow]

I usually do three varieties about this time of year, early, mid and late ones. "Bandit" are the best one I've found for spring leeks, they put on a lot of growth in march April  and early may until they rise to flower. Although I'm trying five different varieties this year. I sowed them a couple of weeks early, hopefully I won't get many that bolt