![]() ![]() They are specific to a crop and are available in a variety of sources including through university Extension services, online, and through trade magazines. Recipes contain an amount of each nutrient to add to the nutrient solution. Recipes are also available to make nutrient solutions. Fertilizer programs can cost more than using recipes to make nutrient solutions.For example, if a water source has 30 ppm of potassium, there is no way to adjust the amount of potassium applied in the fertilizer program. Another drawback is that fertilizer programs do not allow growers to account for nutrients already in the water source.Solely using a fertilizer program does not allow for just phosphorus to be easily added. For example, if the foliar analysis indicates that more phosphorus is needed. Fertilizer programs do not allow for easy adjustments of individual nutrients.Making nutrients solutions requires very little or no mathematical calculations.Minimal ordering of fertilizers is needed (only 3 in the Hydro-Gardens example).Photo: Elsa Sánchez, Penn State Advantages to Fertilizer Programs ![]() Directions for use from the back of the Hydro-Gardens Chem-Gro tomato formula bag. To make a nutrient solution, it is supplemented with calcium nitrate and magnesium sulfate, depending on the variety and/or stage of plant growth.įigure 2. It has an analysis of 4-18-38 and also contains magnesium and micronutrients. ![]() In this program, growers purchase Hydro-Gardens Chem-Gro tomato formula. An example of a fertilizer program is one offered by Hydro-Gardens for hydroponic tomatoes. They are offered by some hydroponic and/or fertilizer companies and vary by hydroponic crop. Fertilizer Programsįertilizer programs consist of a complete fertilizer supplemented with macronutrients. Basic approaches to creating nutrient solutions are fertilizer programs, recipes, and complete fertilizers. In hydroponic systems, most plant nutrients are supplied through nutrient solutions. ![]()
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