Insufficient light causes elongated stems as plants stretch toward available light. Excessive nitrogen fertilization promotes soft, rapid growth. Overcrowding creates competition for light even if overall levels seem adequate. High temperature accelerates elongation, especially at night. Excessive watering contributes to legginess through rapid but weak growth. Solutions include improving light distribution, balancing fertilization, thinning plants, lowering temperatures, and reducing irrigation frequency. Some growers use plant growth regulators as a last resort.