Question

In the Northern Hemisphere, owners and managers of plant nurseries have to plan lighting schedules for a long-day plant that will flower in February. What lighting periods and color will be most effective?

a) Short lighting periods with red light
b) Long lighting periods with blue light
c) Short lighting periods with blue light
d) Long lighting periods with red light

Answer 1

Long lighting periods with red light are most effective for promoting flowering in a long-day plant that will bloom in February.

Step-by-step explanation:

In order to promote flowering in a long-day plant that will bloom in February, owners and managers of plant nurseries should provide long lighting periods with red light.

Long-day plants require a night period shorter than a critical value in order to flower. By providing long lighting periods, the night period is shortened, which stimulates flowering. Red light is particularly effective in promoting flowering in plants.

Therefore, the most effective lighting schedule for a long-day plant that will flower in February is long lighting periods with red light.