Photoperiodic control refers to the way potted chrysanthemums are initiated to flower.

Photoperiodic control refers to the way potted chrysanthemums are initiated to flower.

• A. Irrigation scheduling
• B. Fertilizer schedule
• C. The way potted chrysanthemums are initiated to flower
• D. Pruning routine

Answer: (C)

Photoperiodic control is about flowering being governed by day length. Chrysanthemums initiate flowering when the night length reaches a threshold, so growers manipulate light exposure to trigger floral initiation. This concept is separate from irrigation, fertilizer, or pruning, which affect growth and health but do not determine flowering based on day length. Therefore, the description that matches photoperiodic control is how potted chrysanthemums are initiated to flower.

Photoperiodic control is about flowering being governed by day length. Chrysanthemums initiate flowering when the night length reaches a threshold, so growers manipulate light exposure to trigger floral initiation. This concept is separate from irrigation, fertilizer, or pruning, which affect growth and health but do not determine flowering based on day length. Therefore, the description that matches photoperiodic control is how potted chrysanthemums are initiated to flower.