Is flowering patterns independent or dependent

The correct answer is dependent.

Explanation:

A variable whose variation does not rely upon that of another is known as the independent variable. An independent variable is modified or monitored within an experiment to examine the influence on the dependent variable. On the other hand, the variable that is being measured and examined within an experiment is termed as the dependent variable.  

The flowering pattern is being considered as the dependent variable as the pattern of flowering relies upon the concentration of light exposed by the plant.