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This video is the result of a KZfaq search on "Orchids" where I found videos which described orchid fertilizers (in ways that surprised me). In this video, I go over some different orchid fertilizers, explain the components and differences. I also reveal why most of these water soluble fertilizers are blue (it is not the copper). I am happy to try to find the answer to any general scientific questions or comments that you might have on orchids or plant propagation.