Hydroponic gardening helps to eliminate the need for weeding and helps to cut down on diseases and pests. This form of gardening is also easily adapted to indoor environments, which means it can be used throughout the year to grow a gardener’s favorite plants. The greatest advantage to hydroponics is the overall outcome of the plants, which will be of better quality and are much healthier. The energy saving poly greenhouse covers, the PVC pipe used in the feed systems, and the nutrient injector pumps & reservoir tanks were all made of types of plastic not available prior to the 1970s. As both small and large hydroponic farms were established in the late 1970s, it was proven that hydroponic culture could produce premium produce and be a profitable venture. If there is a large infestation then there will be webbing visible after a light misting of the plants' leaves. It’s a good idea to take time, and find out how many of your plants are affected. Determining the number of spider mites in your garden, the size of the area they cover, and the size of the infestation will give you an idea of how to eliminate them. Many people like to start with tomatoes or roses since they have many hardy varieties to choose from. Gardeners will also want to try using the blue and red spectrum lights to increase growth and the flowering of their plants. The temperature control units may also come in handy once you decide how many plants you want to grow in your space. Many growers use hydroponics systems to grow tomatoes, lettuce, watercress, cucumbers, herbs, and various other edible plants. Beginning growers will be satisfied with the quality of their crops, and the rates at which they will grow. Flowers and tree seedlings can also be grown using hydroponics. Hydroponic greenhouses produce millions of plant seedlings each year, which are transplanted and grown at other locations where they are later planted into soil. The pH is the most important factor to monitor because the pH of a nutrient solution reads the outcome of an electrical battle between the roots and everything that surrounds them. The run off from growing plants in pots is the best place to measure the pH level. The protein and enzyme molecules in a plant are structured in very specific shapes in order to catalyze a chemical reaction to build the plant cells.