Posted: 20/07/2014 at 19:55
It will be caterpillars eating the heads. But don't worry, that won't hurt the sprouts as they grow up the stem of the plants. So long as you planted them in firm ground they will recover.
It is impossible to buy (except in a bag of frozen kernels) sweetcorn as good as you can grow yourself. Same goes for early potatoes.
Just avoid 'wonder vegetables' in over-coloured catalogues. Ordinary vegetables like beans, lettuce and peas are widely grown because they are easy. Simple.