Photoperiod controls

Photoperiod controls flowering in many plant species. Based on the photoperiodic effect, plants can be divided into three groups which are short-day, long-day and day-neutral plants.
Design an experiment to categorize chrysanthemums, carnations and tomatoes according to their photoperiods. Your experiment should focus on the materials, methods and expected results. You also need to justify each result that you expect from the experiment.Available in PDF format.