It’s a little grub that gets between the layers of the leaf and eats it … can’t remember what it’s called … it loves beetroot and chard and stuff like that … spoils the look of it but not usually a huge problem. You can squish them by squeezing the leaf between finger and thumb.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.