- This small shoot is an example of a hydroponically grown plant.Jupiterimages/BananaStock/Getty Images
Hydroponic growing uses a water solution or another substrate, other than soil, to provide plants stability and to deliver all necessary nutrients. The number of plants that adapt to hydroponic growing is unlimited. However, a few plants have shown themselves to be particularly well adapted to this kind of growing. When growing indoors, gardeners combine hydroponic techniques with grow lights to provide the plants with UV light necessary for photosynthesis. - A favorite among seasoned and amateur gardeners alike, the tomato adapts well to hydroponic growing, indoors. According to the University of Arizona, tomatoes grown inside greenhouses perform best at temperatures between 70 and 79 degrees F by day and between 61 and 65 degrees F at night. There are varieties that flourish in indoor environments without much change between day and night temperatures. Shortly after planting when the plants are still seedlings, maintain a constant temperature of 68 to 72 degrees F. The air's humidity level also directly affects the plants' behavior. Tomatoes thrive with humidity between 65 and 75 percent at night and 80 to 90 percent by day. Lower humidity will lead to lower yields.
- Strawberries grow well in indoor hydroponic arrangements. In Florida after Hurricane Andrew, at least one strawberry farm reconsidered its growing strategy, "stacking" layers of hydroponic strawberry plants to grow 30 acres of crops in just one acre. To grow strawberries hydroponically, most gardeners begin with cold-stored runners from other plants instead of seeds, as plants grown from seeds may take 2 to 3 years to produce if grown hydroponically. Compared with traditionally grown plants, hydroponic strawberries typically offer higher yields. They adapt to a range of hydroponic techniques, including nutrient film technique, in which a gentle stream of water continuously delivers nutrients to the plants.
- Lettuce grows well hydroponically, as evidenced by commercial growers' widespread adoption of the technique. One technique allows the lettuce to "float" in a shallow pool of nutrient-rich water, buoyed with floats. Another technique uses long PVC tubes approximately 2 inches in diameter with holes drilled at regular intervals. The lettuce roots grow down through the holes, reaching the stream of water and nutrient within the tube. According to Texas A&M University, many Texas farmers adopt this technique, pumping water and nutrient through the pipes continuously in order to keep the lettuce roots constantly and fully bathed in the solution.
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