Sowing winter vegetables

It still amazes me, how organised a gardener has to be. Here we are, in the middle of summer, and I have had to sow all my winter vegetables.
We have to get all our vegetables planted out in March*. Any later than that and the seedlings sit in the cold soil, shiver, complain and do nothing. They just don't grow.It's a risky business, though. We might still get a heat wave. And if that happens after I've planted out the tender little seedlings, well, they'll be cactus. So, I sow more than I need. Just in case.
*I am talking about our particular place. Autumn hits earlier here, than in the city. Every place is different. :)

In March, the soil is still warm and the seedlings are off to a good start. They can grow to a reasonable size, before the cold weather hits.

Now I'll better get the winter beds organised. Always a bit awkward when we haven't even started our proper summer harvest yet. Oh, the joys of gardening! :)

Edit: What have I sown?
Kale (2 varieties), brusselsprouts (2 varieties), cabbage (3 varieties, cauliflower (2 varieties), onions (4 varieties), spring onions, lettuce (5 varieties), celery, celeriac, chia, amaranth, mustard, leeks, silverbeet, spinach, broccoli, purple sprouting broccoli ...That should be about it. Direct sowing of root vegetables next month.