It’s really not a secret but I think many people forget about it. It’s light. Lighting is crucial when you shoot macro flower photography. You’re too close to use a camera mount flash, so you either must use natural light (plus a reflector) or plug in some lights. Being that I shoot all my flowers outside or on location, hooking up lights is never an option. So I always pay attention to the time of day it is and look for the flower with the best lighting. Depending on the type of flower and color, rear lighting can work better vs frontal, however I find side lighting works best most of the time. It shows off the shape and curves of the petals better, creating more depth and interest.