Hydroponics is the method of growing plants without soil. THERE ARE A LOT OF CHOICES confronting the soon-to-be indoor gardener. Choice is good, but it can get a little overwhelming and the novice grower may soon have difficulty seeing the forest for the trees. When considering what type of growing materials and equipment you will require, it is important that you first determine how you intend to grow. Choose a cultivation practice that suits your skill level and perhaps your busy lifestyle. The following is a basic overview that may help shed some light on the strengths and weaknesses associated with four basic types of growing: organic, hydroponic, soilless, and aeroponic. Hydroponic plant production systems can range from simple to very complex in construction and management. True hydroponic systems use no growing media; plants are mechanically supported and nutrients are supplied in a hydroponic fertilizer solution. The solution may be recirculated throughout the growing media or drain-to-waste. The nutrient solution may be applied intermittently or constantly. In a hydroponic nutrient solution, plant nutrients are supplied chemically in specific ratios and quantities in a variety of plant-available forms to optimize nutrient uptake. Nutrients can be precisely formulated for optimal nutritional levels in each stage of the plant’s development. Essentially, growers may tailor a nutrient diet for their specific growing variety, cycle, and conditions. With experience, growers may be able to push crops with intensive nutrient management. Complex hydroponic systems are not often recommended for inexperienced growers or those lacking time to monitor and adjust the system. However, novice growers who have purchased complete aeroponic systems supplied with a level of support, specific nutrients, and application directions have had some incredible results. Sometimes the novice grower looks to save money and attempts to construct or replicate a complex hydroponic system. The results can be poor due to the grower’s focus on system design, construction, and operation, rather than on actual crop management. Construction is what a professional manufacturer would call product development. Be prepared for the possibility of a steep learning curve when fabricating a new system if you are relatively new to growing or growing system construction. For example, using the wrong kind of adhesive may be the kiss of death. If you are not aware of what you are doing, the crop may be finished before you even plant it. Hidroponik berasal dari bahasa Latin hydros yang berarti air dan phonos yang berarti kerja. Hidroponik arti harfiahnya adalah kerja air. Bertanam secara hidroponik kemudian dikenal dengan bertanam tanpa medium tanah (soilless cultivation, soilless culture). Pada awalnya bertanam secara hidroponik menggunakan wadah yang hanya berisi air yang telah dicampur dengan pupuk, baik pupuk mikro maupun pupuk makro. Pada perkembangannya, bertanam hidroponik meliputi berbagai cara yaitu bertanam tanpa medium tanah, tidak hanya menggunakan wadah yang hanya diisi air berpupuk saja. Medium pasir, perlite, zeolit, rockwool, sabut kelapa, adalah beberapa bahan yang digunakan oleh para praktisi di dunia dalam bertanam secara hidroponik. Menurut pengertian ini, maka menanam anggrek (kecuali anggrek tanah) sebenarnya merupakan salah satu praktek bertanam secara hidroponik. Ada beberapa sistem hidroponik yaitu NFT (Nutrient Film Technique), Ebb-Flow, Deep Flow Technique, Drip Irrigation, Aeroponics, aquaponics.