Studies with the long-day plant
Sinapis alba and the short-day plant Xanthium strumarium L.
In a long-day plant
, Arabidopsis, three causal genetic pathways to flowering, i.
Some crops are short-day plants, typically those grown in spring and fall, and some crops are long-day plants
, which require more than 12 hours of light to flower.
Most summer flowering plants are long-day plants
, requiring 14 hours or more of day length.
These are either short-day or long-day plants
flower in the summer, short-day plants flower in early spring or fall, and day-neutral plants will flower under a variety of light conditions.