A. The best time to take clippings is during the vegetative stage to reduce stress and likely hood of inducing hermaphroditic tendencies or cause unwanted stretching. Though you can clone a plant all the way to the end of its life cycle which is called reverting from clone, it is harder and takes longer to clone and becomes vigorous the longer the plant has been flowering. The vegetative stage is any time 18-24 hours of light. There isn’t a big difference in time of day you actually take the clipping. Water your plants right before taking clones for best results.