Although I don't grow skinneri, there are enough questions about your fertilizing practices that I need you to answer a few questions. Weakly, weekly is the practice of fertilizing at every watering with a water-soluable fertilizer at 1/2 to 1/4 the recommended(on the package) dilution. The quantity applied to the plant is relatively unimportant as long as the plant roots are thoroughly wetted with the fertilizer, regardless of plant size or pot size. Is this what you are doing now? I don't know why fertilizing would cause a bud to fall unless the concentration was too great by a large amount. What kind of fertilizer are you using now?