A long day plant flowers only when it is exposed to

Short day plants flower in

Certain plants will flower only when they are exposed to low tempeature for a few weeks. What do you call for this requirement ?

Long day plants show flowering when

Long day plant's produces flowers when they exposed to :

Certain plnats will flower only when they are exposed to low temperature for a few weeks .What do you call for this rquirement?

In short day plants flowering

Long day plants fail to flower by