I know that you do not need to deadhead a lilac but if asked to do so for aesthetic reasons, is it safe to do at any time without risk of removing next year's flower buds? I see some lilacs mid-summer have formed what looks like green seed pods or buds where the old flowers were but these are not next years flower buds, are they? I have been reading up on it and keep seeing not to do it or there could be reduced flowering the following season but I think that you could safely dead-head but not prune late summer. Am I right? Thank you!