Hi Woody
This is is briefly how I dealt with my leeks this year:
06/02 2015 Sowed 40 Oarsman,40 Pot leeks,,40 Electra, 40 Musselburgh, 2 punnets of Electra (old seed)
14/02 2015 Oarsman, Pot Leeks, Elefant germnated (8)
15/02 2015 Musselburgh & Electra germinated (9)
28/02 2015 Potted up 15 Pot Leeks,21 Musselburgh,24 Oarsman into 3" pots
10/03 2015 Potted up 25 Elefant into 3" pots
11/05 2015 Planted out 21 Oarsman,11 Pot Leeks,23 Elefant,22 Mussleburgh,2 Electra
My seed trays sit on my hot bed set to give a soil temp of around 65°F (18°C) until they germinate.
I leave them like this for around 2 weeks then prick them out one to a 3" pot, and leave them in good light on the greenhouse bench.
At this stage the night-time heating in the greenhouse never goes below 40°F (4°C)
I plant them out around 8"-9" apart when the garden soil is beginning to warm up, in rows 15" apart.
Prior to planting I rake in Fish,Blood & Bone at around 3-4 oz per sq yard.( 75-100gms/sq metre)
This is all the feeding I usually give them in a season.
Having said that during my exhibiting days I would supplement this feeding, but as you see with the pictures above I see no point in going to the additional expense of fertiliser when I am only growing them as culinary Leeks.
Finally I would have to say I have neglected them a bit this year in terms of weeding.
Currently they are surrounded with Chickweed,Dandelions & Fat Hen but this does not seem to have affected their growth.
I hope that answers your question, and let me wish you the best of luck with next seasons crop....Tg