Which of the following describes crop-specific greenhouse requirements for tomatoes versus leafy greens?

• A. Tomatoes need higher light and warmer day temperatures; leafy greens prefer cooler temperatures and may be susceptible to disease with leaf-wetting.
• B. Tomatoes and leafy greens have identical temperature and irrigation needs.
• C. Leafy greens require warmer temperatures than tomatoes.
• D. Tomatoes require less irrigation than leafy greens.

Answer: (A)

Understanding how different crops respond to greenhouse climate is essential. Tomatoes are warm-season crops that perform best with brighter light and warmer daytime temperatures, which support photosynthesis and fruit development. Leafy greens, by contrast, thrive in cooler daytime temperatures and can suffer reduced quality or bolt if it gets too warm. They are also more prone to disease when leaves stay wet from overhead irrigation or condensation, so avoiding leaf wetness helps reduce disease pressure for greens.

The combination described—providing higher light and warmer day temperatures for tomatoes while keeping leafy greens in cooler conditions and managing humidity to minimize leaf wetness—fits how these crops respond in a greenhouse. Other options conflict with typical crop physiology: crops do not have identical temperature and irrigation needs; leafy greens do not require warmer temperatures than tomatoes; and tomatoes do not universally require less irrigation than greens.