Clay Ground and Strong Summer Growth
Horam sits on the shoulder between the High Weald and the Low Weald clay vales, and on the clay ground the difference shows in how fast a hedge grows. Ground that holds moisture keeps a hedge growing hard right through the summer, and the heavy clay soils Natural England associates with the Low Weald do exactly that. A hedge on that ground rarely runs short of water through an ordinary Sussex summer, and it puts on a lot of growth between spring and August.
The practical upshot is that a hedge left for two seasons here is usually out of shape rather than merely untidy, and the quick growers make the point loudest. Privet, leylandii, and laurel will often want more than one cut a year to stay where you put them, while beech, hornbeam, and yew are generally content with a single annual cut.
