Mars rules all things energy, action, and desire. The red plant represents our survival instinct and dominates our more base instincts for aggression, anger, and our primal need to survive. It is the planet of action and depending on it’s location in your chart, can indicate how you spend your energy and how you argue or fight.
Sexuality, passion and power all come under Mars’ rule. Where Venus governs romantic attraction and what we see as beautiful, Mars defines our basic body attraction.