I have a south facing back yard with 3 Pyracantheas affixed to lattice on the south fence which I planted only about a year ago. Last year they looked great but for some reason they are struggling and the leaves are turning brown from the ground up. Last year I did amend the soil with steer manure but not sure what's gone wrong this year. Perhaps it just got too wet and cold here on Vancouver Island, not sure. Anybody else have similar problems?