Boric acid, manganese chloride, zinc sulfate, copper sulfate and iron sulfate can be used in minute amounts in the nutrient solution. Many people who grow their hydroponic plants in a greenhouse will also find that they need the correct amount of carbon dioxide in the air in order for their plants to flourish. The Benefits of Gardening the Hydroponic Way Gardening has been considered to be one of the most therapeutic rewards for North Americans. Gardening stimulates all of the senses, giving great satisfaction and pleasure. Hydroponics is the growing of plants without the use of soil. There are a variety of benefits associated with hydroponic gardening. Many think using pesticides to eliminate spider mites in their hydroponic gardens is a good idea, but the use of pesticides in hydroponic gardening is discouraged and usually not necessary. Hydroponically grown plants are not immune to spider mites, but they are more pest resistant than plant grown in soil. Typical beginning tables for your plants include plastic tubs, a child’s swimming pool or fish tank. A gardener can also buy any of the items they need for their grow room from stores specializing in hydroponic supplies. Once you have your grow room or greenhouse set up, you can decide which plants that you want to try and grow. Growing media for hydroponics includes, expanded clay, rockwool, perlite, vermiculite, Styrofoam, sand, pea gravel, and other mediums. There are many types plants that can be grown in a hydroponics system. Some plants will grow better in hydroponics system than others. Many growers use hydroponics systems to grow tomatoes, lettuce, watercress, cucumbers, herbs, and various other edible plants. Many different civilizations have utilized hydroponic growing techniques throughout history so they are not a new method of growing plants. Giant strides have been made over the years in this innovative area of agriculture. Throughout the last century, scientists and horticulturists have experimented with different methods of hydroponics.