I had often questioned this advice (in my mind). Manufacturers of soluble fertilizers give instructions on how to use their products based on years of study, trials, and experiences. So why the need to deviate from their recommendations?
“Fertilizers are carefully crafted to provide an optimum level of salt in the soil solution when used as directed. Let the directions be your guide. Do not use more or less than the recommended amount, or more or less often than listed on the label. You will find that many fertilizers, especially soluble forms such Miracle Gro, Miracid, Peters, etc. will list a concentration for a particular feeding period. The more frequently you wish to fertilize the less concentrated the solution. From my experience I do not see any benefit to feeding more frequently than once every two weeks. This is a standard nursery practice for soluble fertilizers. Fertilizing more often than this will require more dilute solution and will waste more material as the excess spills to the ground each time. It is also more work to prepare the solutions more frequently.” Read more…
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