Greenhouse Temperature & Humidity

Overview

A greenhouse is an enclosed structure that provides a consistent environment to the plants inside. Properly controlled heat and humidity is essential to the greenhouse's success. Although some greenhouses are simple and have few environmental controls, some greenhouses have complex heating, humidity and ventilation systems that allow different parts of the greenhouse to store divergent plant varieties.

Location

Choose a good location for the greenhouse to give it enough heat to store plants. The West Virginia University Extension Service recommends a south to south-easterly side of a building or shade tree. This give the greenhouse both heat and cooling throughout the day. Growth is maximized if the heat and sun are at their peak early in the day.

Installed Heating

Add heating to a greenhouse to prevent the freezing of plants and to increase seed germination rates. The amount of heat required for a greenhouse depends on the desired indoor mean temperature for most of the plants inside, according to the Clemson University Cooperative Extension.

Heat Varieties

Choose between space heating, radiant heating or zone heating according to your needs. Space heating is the heating of the air inside the greenhouse. Radiant heating heats the soil of the plants directly. The soil is warmer than the air with radiant heating. Zone heating allows you to add heat to the areas of the greenhouse needing it. This is ideal for greenhouses growing several types of plants.

Humidity

Humidity is needed in the greenhouse to keep plants from drooping. Excess humidity in the greenhouse may cause disease by making large puddles and condensation on the leaves of plants. The greenhouse structure is often manipulated to guide dripping condensation to a rain bucket for later use. No-drip plastic surfaces are also available for greenhouse construction.

Ventilation

Install two air handling systems in your greenhouse to help control temperature and humidity. One fan is dedicated to an air exchange system while the second fan is for air circulation. This prevents condensation and stagnant, hot air that breeds fungi.

Keywords: greenhouse temperature, greenhouse humidity, greenhouse management

About this Author

Cleveland Van Cecil is a freelancer writer specializing in technology. He has been a freelance writer for three years and has published extensively on eHow.com, writing articles on subjects as diverse as boat motors and hydroponic gardening. Van Cecil has a Bachelor of Arts in liberal arts from Baldwin-Wallace College.