"Cuttings can be taken at any time in a plant's life-cycle, but those taken before the plant is flowering will root more easily. Larger branches sometimes exhibit white protuberances near the base of the stem. These are called adventitious roots. They appear under humid conditions, and grow readily into roots when placed in water or in various mediums. Cuttings from the lower branches, which contain less nitrogen and have a higher ratio of sugars, root somewhat faster than slips from the top of the plant, so it's wisest to take your cuttings from the bottom branches."
(Ed Rosenthal)

GARDEN KNOWM
Knows I stand corected. I personaly have never took a cutting in
the flowering stage and have herd that they dont do well when in
the stage of flowering.