The house we moved into last year has several beautiful camellia bushes (trees? shrubs?). They're just starting to bloom and all of the bushes are absolutely loaded with buds. My question is this: I make lots of bouquets with camellias all season long, but I don't want to "over-pick" and cause difficulties with next year's bloom. I've heard that picking a lot for bouquets is fine, because you're basically just giving it a nice prune, but what's the rule of thumb with camellias?