What Plants Can Be Grown Hydroponically

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Hydroponic growing is a cultivation method in which plants are grown using nutrient mixes rather than soil. Virtually any plant that grows in soil can be grown using hydroponic methods. Some plants, however, respond to hydroponic cultivation better than others.

How Does Hydroponics Work?

  • Plants do not actually need soil itself in order to grow; they need the nutrients within the soil. Thus, plants can grow in water containing nutrient fertilizers, with or without physical support from sand, gravel, peat moss or other substances.

Types and Methods

  • The two main types of hydroponics are solution or liquid culture, in which the plants grow only in the nutrient solution; and medium or aggregate culture, in which the plants grow in a medium, such as sand. Each medium culture is named for the medium used. Hydroponic systems are further classified as open (cultures are not reused after being delivered to the plant) or closed (cultures are recirculated and reused).

What Grows Best?

  • Lettuces, celery, spring onions, herbs and especially tomatoes can see drastic improvement in flavor from hydroponic cultivation methods. Any number of other food crops can also be grown with standard results.

    Vegetable such as corn, zucchini, summer squash and melons will grow hydroponically, but their stalks or vines will take up undue amounts of space. Consider your needs and space limitations before growing these plants.

    Flowers and other plants can be grown hydroponically, though results may vary. Vegetables are the most popular choice for hydroponic cultivation.

History

  • Historically, widespread hydroponic use is fairly recent. Evidence of mica-based hydroponics dates to 1 A.D. during the reign of Roman emperor Tiberius, though the technology was little used until the 17th century in Europe. Interest in large-scale American hydroponic production began around 1925.

Significance

  • Many hydroponic crops, such as tomatoes, are available fresh to the consumer earlier than they would be if cultivated in the soil. Hydroponic greenhouse owners are able to control temperatures and growing times in ways they could not if waiting for the soil to thaw, frost danger to pass, and air temperature to regulate.

    Besides eliminating the need to coordinate growing times to the seasons, hydroponic cultivation offers high yields, can help protect the environment, and conserves water and other resources.

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