You manage a greenhouse that produces roses for Valentine's Day. Roses normally bloom in June. Which of the following will most likely be the best lighting schedule for your roses?

Question

Quizplus · Accepted Answer

Roses require at least 8 hours of uninterrupted darkness in order to produce blooms. Therefore, the best lighting schedule would be 16 hours of light followed by 8 hours of uninterrupted dark, as option B suggests. This will mimic the natural light cycle of June, when roses would typically bloom. Options A, C, and D either do not provide enough uninterrupted darkness or provide too much interruptions in darkness, which would not allow the roses to bloom properly.

You Manage a Greenhouse That Produces Roses for Valentine's Day