Maximum Yield USA January 2017 | Page 110

HYDROPONIC GINGER & TUMERIC PRODUCTION G inger and turmeric are members of the Zingiberaceae family of tropical and subtropical plants. They are wellsuited to protected cultivation in a warm, humid environment with plentiful nutrients and moisture-retentive substrate beds. Fresh rhizomes of ginger and turmeric have long been recognized for their culinary properties. They provide a slightly different, more aromatic flavor profile than their dried counterparts, owing to the presence of volatile compounds that are released when the rhizomes are cut or grated. Aside from their use in edible dishes, ginger and turmeric both have several medicinal uses, with fresh ginger used to alleviate nausea, while turmeric has long been used for its digestive, antioxidant, and anti-inflammatory effects. Turmeric contains many powerful compounds, including different curcuminoids and volatile oils like zingiberone, turmerone, and atlantone. Ginger contains gingerol, a natural bioactive compound known to have anti-inflammatory and antioxidant properties, as well as be useful as a digestive aid and as an antibacterial agent. Along with these medicinal and culinary properties, a well-developed ginger or turmeric plant provides a lush, tropical feel to any indoor garden, with their large, lime-green, attractive leaves. Turmeric plants also have the advantage of producing beautiful exotic blooms if conditions are conducive to rapid growth and development. Growing ginger and turmeric hydroponically ensures the rhizomes can be harvested at any stage. Fresh, young ginger rhizome has a crisp and juicy texture that lacks the fibers of older rhizomes. Its flavor is subtle and ideal for slicing thinly to eat raw or to make into pickled ginger for use in Japanese cuisine. Fresh turmeric has a mild, earthy flavor, and a fingerstaining, intense yellow color that is often used as a natural dye. Young harvested turmeric rhizome can be used immediately, grated into curries and other dishes, or blended with fruit and vegetable juices to create a supercharged smoothie. The harvested rhizomes may also be air dried and will keep for many months before being replanted for the next crop or consumed. 108 Maximum Yield USA  |  January 2017 Turm into eric plan a hy drop ts ready fo onic syste r transp lanti m. ng PROPAGATION Ginger and turmeric are surprisingly easy to propagate from rhizomes purchased from the supermarket, specialist Asian grocery market, or online. Both are sold as fresh rhizomes, although they may have been in storage for several weeks to months before sale. In this dormant state, the buds present on the sides of the rhizomes remain relatively flat and difficult to see. Once conditions become sufficiently warm, these buds start to swell. “ GROWING GINGER AND TURMERIC HYDROPONICALLY ENSURES THE RHIZOMES CAN BE HARVESTED AT ANY STAGE.”