IPA: /fləˈrɛsəns/
KK: /flɔˈrɛsəns/
A time or condition when plants produce flowers, or a period of growth and success.
The garden was full of color during the florescence of spring.
Florescence is formed from "florere" (meaning to bloom or flower) and the suffix "-escence" (meaning the process of becoming). The word describes the process of blooming or the state of flowering.
Think of the word 'florere' which means to bloom, and remember that 'florescence' refers to the process of blooming.