In my backyard there are 5 or 6 camellia bushes that have been here long before we moved here, I am estimating at least 15 years or so since we have lived here for ten. The are very unhealthy looking, straggly and wild, and I would like to cut them back since they haven't been bothered with in the 10 years we have lived here. My question is when and how should I trim them? I am seeing some very small buds on them now, and I don't want to kill them by cutting them back too much or too soon. Any advice would be Greatly appreciated.. thanks!