What factor primarily determines the time of year that a plant flowers?

Photoperiod determines the time of flowering in many plants. Accordingly the plants have been classified as short day plants, long day plants and day neutral plants. A short day plant can be brought into flowering by putting in the dark for a specific period of time for the required days. Similarly, long day plants can be subjected to artificial light of desired intensity to initiate flowering.

Photoperiod determines the time of flowering in many plants. Accordingly the plants have been classified as short day plants, long day plants and day neutral plants. A short day plant can be brought into flowering by putting in the dark for a specific period of time for the required days. Similarly, long day plants can be subjected to artificial light of desired intensity to initiate flowering.