Leeks are traditionally raised in a specially prepared seedbed and transplanted later as young plants to their permanent site, but a Rosemoor we do things differently. We raise our young plants by sowing the seed direct into 7.5 litre pots and germinating them under glass. The ideal size for transplanting is when the young leeks are the size of a pencil.
Sow the seed about 1-2 cm apart and thin if they come up too thickly. Our seed was sown on 13th April and transplanted to the final site on 1st July. They normally follow first and second early potatoes. The early cultivars should start cropping from October onwards.