By Johnpease
yorkshire,
United Kingdom 
I have some Greyhound cabbages which are not hearting properly.Those which have done are being eaten right inside,I have used an insecticide.
23 Aug, 2013
Previous question
More likely slugs if you can't see any caterpillars. They sneak out at night and go home by morning so you don't see them.
23 Aug, 2013