Finally - we have planted the carrots. The ground here is gravel/sand so heaps of little rocks and no good for lovely long straight carrots. This is why we haven't had success in the past. This year we're trying a trench method I read on the net. The bloke said to dig a trench and simply fill that in with soft sandy organic matter, rather than have to cultivate (or sieve in our case!) a large area.
So we've done it. Trench dug, filled with lovely worm castings - generously donated by Grumps, thanks! and carrot seeds sprinkled on top.
We'll see how they go!