holly hedge -some plants failing/dying

Questionsholly hedge -some plants failing/dying
chris normile Staff asked 13 years ago

I planted 80m of potted green holly Sept 2010 to form hedge. well prepared trench compost and mosspeat, with leaky hose at back, used initially until plants settled in. did very well, lots of new growth in 2011. black leaves and branches appearing this winter in some plants with leaf loss.sheltered site, east facing beside old ditch. any advice