Many times gardeners have no idea if they need shade cloth or shade coverings. Shade cloth partially blocks out the sun and in the process helps to cool the greenhouse. Certain greenhouse coverings diffuse the light and create a natural shade, but glass greenhouses get extremely hot direct sun and will need some sort of shade protection. Some plants are more sensitive than others and will need stronger shade protection. Here is a list of FAQs meant to assist gardeners with many common greenhouse shade cloth questions.

What plants benefit from shade cloths?
• Chrysanthemums, Asters, Snapdragons, Geraniums: Require 30% shade
• Various Vegetables & Herbs, Iris, Lilies, Gloxinias, Misc. Bedding Plants: Require 40% shade
• Bromeliads, Ficus, Orchids (Dendrobiums, Epidendrums, Vandas): Require 50% shade
• Orchids, Azaleas, Ferns, (Oncidiums, Phalaenopsis): Require 60% shade
• Ferns, Philodendron, Orchids (Cypripediums): Require 70% shade
• Ginseng: Requires 80% shade
• Aglaonema (Chinese Evergreen): Requires 90% shade
• Other plants traditionally need 40% of shade

How long does a shade cloth traditionally last?
Most shade cloths of high quality will last for ten to fifteen years, keeping their shape and effectiveness. The weather and care of the cloth most often determines its longevity.

How should I attach the shade cloth or greenhouse coverings?
A shade cloth can be attached with screws, nails, ropes or cables.

Is a shade cloth enough to cool a greenhouse?
While a shade cloth will prevent plants from overheating and burning, proper cooling systems are most effective for cooling. An appropriate ventilation system is essential for proper greenhouse growth. Light, temperature and humidity control are important and a good ventilation system can provide appropriate amounts of these essentials.

How do I know what size of shade cloth to get and what color?
Shade cloths come in many colors, which only matter in personal preference. For size, a shade cloth should cover the roof and 2/3 of the side walls when unrolled. Thus, you can measure how much material it would take to do this on your greenhouse. Most shade cloths and greenhouse coverings go on the exterior of the greenhouse. This is because they can easily be removed for winter and won’t overheat like inside coverings might.

Before buying a shade cloth or greenhouse coverings, be sure you’re getting the type which will work best for your plants and the structure of your greenhouse. It’s important to do research before purchasing, as you’ll want to ensure you’re getting the appropriate size and type for maximum plant growth. In addition, getting the most effective and appropriate type will ensure your comfort while working in the greenhouse as well.