Most pheasants and partridges which nest in hedges choose sites in the grassy vegetation of the hedge bank, rather than right into the woody cover of the hedge itself. As a result, hedge management should be aimed at keeping shading of this area to a minimum.
So, the best scheme is to keep the hedge fairly low, cutting back to no more than 2 metres, and to keeping the sides trimmed to a vertical. Trimming to an ‘A’ shape results in a wide base, which shades out more of the nesting cover.