Thanks, Ray. I will only use one or the other from now on and in small doses. This makes sense from my experience with vegetable seedlings. I first started to believe in kelp when I noticed that it really improved growth of some of my garden seedlings (broccolli and tomatoes) which I start under lights. The cucumbers and squash however did terribly. They hardly grew and had brown, curled leaves. When I restarted them and did not use the kelp they did fine. Maybe some plants are more affected by it than others. I'll have to do some research for guidelines on using kelp on orchids. Do you have any links?