This helps you gain an understanding over time of how much is needed so you can take some of the guesswork out of it. I like to keep a record of the water added to the reservoir, along with exactly which nutrients and how much and any pH adjuster used. This is a great kit that comes with information for the grower along with the calibration solutions and probe cleaners to get you started. These are very important tools to have, and please don’t forget to calibrate your pH meter regularly to get accurate readings. You can purchase the Bluelab Grower’s Toolbox from Hort Americas for $199 if you do not have a pH and EC meter. It is important to have the tools to monitor your pH and EC.
There are other sources of information on fertilizer recipes by universities for various crops that can be found online. It is split this way to prevent the reaction of calcium with sulfate and phosphate that will cause some of the nutrients to fall out of solution and not be available to the plants. Part A has the calcium nitrate, iron and sometimes half of the potassium nitrate and Part B includes the remaining nutrients. Some growers choose to purchase a pre-mixed product that usually will come in at least two parts.
Most, if not all, of the needed fertilizers can be purchased through Hort Americas. The nutrients you add will vary depending on your crop. If your pH is above 7 adjust your pH down to around 6 – 6.5 before adding your nutrients. Once you have completed building your system, fill your reservoir with water. It is a good idea to research the crop you want to grow to find which substrate will provide the optimum drainage and water retention necessary to keep your crop healthy and happy. The smaller the particle the more water retention you will have and larger particles allow for better drainage. These substrates can be blended or used alone. That depends on the crop you are growing and personal preference. The next step is to decide what substrate you’d like to grow in. Hort Americas can provide you with the supplies you need with the exception of the wood, PVC, binder clips and clamps which we suggest sourcing locally. 2X4s (Legs, side stretcher and box apron)
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