The temperature of a growing environment is crucial to maintain optimal growth and maximize the genetic potential of the plant. The ideal temperature will vary given the stage of growth and the type of plant being grown. During vegetative growth, plants are growing very rapidly and can tolerate higher temperatures than during fruiting and flowering. A typical safe range for vegetative plants is 75-80°F during the light (day) period and 55-60°F during the dark (night) period. For fruiting and flowering growth, the temperature range is 70-75°F during the day and 50-60°F during the night period. Monitoring the growing environment with a thermometer that has minimum and maximum temperature logging is a valuable tool to keep track of the fluctuation of temperature throughout the course of the day.