[Robin Redbreast]

how is this done with say: cabbages? or any other veg really? it for me sounds complicated how do you do it to create   a good all year round crop?

[Ivor Backache]

Decide how often you buy a cabbage and sow to meet that demand. I sow four seeds every three weeks. Pot them on to at least four inch and transplant in the allotment. At the moment I have a row of 10 cabbages of diminishing size. I have another four in pots and another four as seedlings. I am doing the same with cauliflowers. Choose seeds that correspond to the season you are growing in. I have finished sowing spring cabbage now sowing summer types and will then move onto the winter types.
Other veg are not so critical because you can store or freeze them.  Peas I grow a third of row at a time every two weeks. I have just completed a row. I could easily grow a row and freeze them. I prefer to do it this way and have them fresh.

[Eatyourgreens]

Ivor is spot on and by choosing varieties that suit the season you can maintain the the period with enough to eat, and with the spaced out sowing not "too" many gluts.

As Ivor say's sowing just enough seed for what you want and repeating works for some plants, others it's not worth worrying about as they store or just don't suit.

But for Cabbage/Greens you choose varieties or even different plants to keep you going so in the Cabbage group, you have Summer Cabbage, Autumn Winter Cabbage, Spring and Savoy Cabbage and if you add in Spring Greens and Kale you can almost keep yourself going all year, for example my Kale finished a couple of weeks ago, but I am now harvesting the leaves of a Cabbage called Advantage that doesn't heart as Greens, I also cropped another lot of these during the late Autumn/Winter, these should keep me going for another month or two before my earliest Pointed Greyhound will be ready.

Trying to work out how to feed yourself for the whole year is fun and eating veg in season (With an extension to it if you can) is also enjoyable, Kale with a Winter Stew, Courgette's with Mousaka in Summer.

Bob

[Salmo]

With lettuce, radish etc sow about a yard of row, sow another yard when these have come up and so on. Usually 10/14 days between depending on weather. These need not be all together but can be any space that is vacant.

[DD.]

It's not really complicated and can be summed up in one word.

PLAN!