Posted: 03/10/2015 at 16:42
No need to keep the holes clear Loz, just let them gradually fill in themselves as rain washes soil in and the leeks will grow perfectly well. They are greedy feeders, so worth digging-in well rotted manure before planting. I also hoe-in a sprinkling of fish, blood & bone later in the season. Strangely, slugs have never been a problem for my leeks although they attack everything else!