I have lots of different varieties of plants in my flower bed and in pots and I was wondering if there was a fertilizer I could use for all of them? Some examples of plants I have is azaleas, lilacs, morning glories, hostas, mothers in law tongue, lavender, elephant ears, ferns, and wandering jews. I know I would have to fertilize all these at different intervals but I would like to just buy one thing of fertilizer to use on all of them if possible. What are some of your favorite brands? What should I be wary of? What are some fertilizing tips?