A neighbour has a very large old camellia -- he's not sure of the name (flowers are medium size formal double, dark red). It is about 10 feet tall, with a spread of about 6 feet. To my knowledge, it is at least 35 years old and has always been very healthy. He pruned it once about ten years ago when it outgrew its space, and he needs to prune it again.

It has finished flowering now, and is just beginning to put out its new growth. Is this a good time to prune, and how much can he cut it back without risking damage to the plant?

Any advice would be appreciated -- you all have been very helpful before, and I would love to have your input.

p.s. My camellias have been glorious this year after a very mild winter. They have almost finished flowering, even the late bloomers like April Remembered.