Last year, I planted a new flower bed with three rose bushes, a Choisya, a Camellia and a Euonymous. The roses are doing absolutely fine BUT the Euonymous has lost all leaves and doesn't seem to be regrowing, the Camellia has turned completely brown and has sprouted some small buds but no flowers and the Choisya lasted well but has now started to droop, although is sprouting new growth. All were well fed and watered regularly after planting and didn't show any signs of problems until winter, they are planted on the inside of a south facing fence but do get some sun in the mornings. What has happened? And can I fix it? Don't want to plant any new beds this year until I know what went wrong with this one!