Importance of photoperiodism :
(a) Photoperiodism determines the Season in which a j particular plant shall come to flower .
(b) Knowledge of photoperiodic effect is useful in keeping some plants in vegetative growth, to obtain higher yield of tubers, rhizomes etc., or keep the plant in reproductive stage.
(c) The phenomenon has helped the plant breeders in effecting cross-breeding in plants.
(d) A plant can be made to flower throughout the
year under greenhouse conditions if a favourable photoperiod is provided to it.