No need to fill the holes in Goosey, they'll do that themselves with the rain (and the snow)...
In fact, I reckon that leeks fare better when they have a hole to grow into, and also, some liquid feed every week lets them wallow in a huge meal for an hour, and afterwards, just get bigger and bigger, er - like I do..;0)
(But I'm on strict instructions at the moment, so braces are-a-cumin-in...)!
Actually, this is the first year we haven't grown leeks (sob). We have a re-rationalisation of the whole garden now we have given up The Patch (double sob), but we've found a wealth of other places to satisfy our gardening desires, like even making a raised bed (Growster, you've always been anti those chaps), yeah, but it's the remains of the old compost heap, and we'll pop in a couple of courgettes and a pumpkin to take the goodness out for the last time!
I'm just so happy pottering about The Turrets now. Hoeing takes fifteen minutes, and we're just looking at the blooming fruit bushes, which provide the sort of stuff that Waitrose or Tesco never supply!