How do greenhouses allow crops to be grown independently of outdoor climate?

Greenhouses allow crops to be grown independently of the outdoor climate by creating a controlled environment where temperature, humidity, and light can be regulated to meet specific plant needs.12

The structure itself, typically made of glass or plastic, traps solar radiation to warm the interior. To maintain optimal conditions regardless of external weather, growers use several integrated systems:12

• Temperature Regulation: Heating is provided by artificial means such as steam, hot water, or electric cables, often managed by thermostats. Conversely, cooling is achieved through ventilation, shading, or evaporative "fan-and-pad" devices to prevent overheating during summer.123
• Light Control: The transparent glazing allows natural light for photosynthesis. Growers can also use supplemental artificial lighting to increase energy for growth or manipulate the photoperiod to induce flowering out of season.24
• Atmospheric and Soil Management: Beyond temperature and light, operators manage relative humidity, soil moisture, fertility, and even carbon dioxide levels to maximize efficiency.32

By assuming these tasks normally handled by nature, greenhouses enable the production of plants that would otherwise be unable to thrive in a given local climate.2