Ayuyo,
Where you live. You can cut at most anytime. Best when growing really well.
Cut it where you have your finger. In later years you will be able to cut it higher up on new branches produced from this cutting job.
Nice plant.
Rick
"Many times a day I realize how much my own outer and inner life is built upon the labors of my fellow men, both living and dead, and how earnestly I must exert myself in order to give in return as much as I received"