Poinsettias and chrysanthemums are short day plants. They need a certain number of hours of uninterrupted darkness to cause the plant to start flowering. Poinsettias need 18 hours of darkness to trigger this. Chrysanthemums need twelve hours of darkness.
long-day
long-day
short-day plants some examples of short-day plants are poinsettias, strawberries, and ragweed
Plants requiring long nights to flower are called short-day plants. These plants use the length of darkness as a cue to initiate flowering. Examples include poinsettias, chrysanthemums, and strawberries.
In general, short-day (i.e. long-night) plants flower as days grow shorter (and nights ... Day-neutral plants, such as cucumbers, roses and tomatoes, do not initiate ...
True. Short day plants require a specific duration of darkness (long nights) in order to flower and complete their life cycle. The length of the dark period triggers hormonal changes in the plant that lead to flowering.
When the nights are the right length. The flowering of most plants is stimulated by the duration of periods of uninterrupted darkness.
A long day plant requires fewer than a certain number of hours of darkness in each 24 hour period to induce flowering. These plants typically flower in the late spring or early summer as days are getting longer. Short day plants flower when the night is longer than a critical length. They cannot flower under the long days of summer. These plants generally flower in late summer or fall, as days are getting shorter. Short day plants will not flower if a pulse of artificial light is shined on the plant for several minutes during the middle of the night; they require a consolidated period of darkness before floral development can begin. Natural nighttime light, such as moonlight or lightning, is not of sufficient brightness or duration to interrupt flowering.
day-neutral plant.
yes short day plants need long nights(novanet )
Long day plants, such as lettuce and spinach, require more hours of daylight to flower. Short day plants, like chrysanthemums and poinsettias, flower when daylight hours are shorter. This difference in daylight requirements influences the timing of flowering in these plants.
Some examples of short day plants that require specific periods of darkness to flower and thrive include poinsettias, chrysanthemums, and Christmas cacti.