Difference between short night flowering plants and long night flowering plants?

Short night flowering plants, also known as short-day plants, require a period of darkness longer than a critical length in order to flower. These plants typically flower in the fall or winter when nights are longer. Examples of short night flowering plants include poinsettias, chrysanthemums, and Christmas cacti.

Long night flowering plants, also known as long-day plants, require a period of darkness shorter than a critical length in order to flower. These plants typically flower in the spring or summer when nights are shorter. Examples of long night flowering plants include sunflowers, marigolds, and zinnias.