Hi I am so glad I came along this article. I now foliar feed all my orchids and they and look so good. I do beleive the natural habitat would have in it's enviroment many minerals in the air in the dewy parts of the day that the leaves tend to absorb. I think of how orchids do live in the wild as best as I can understand. And then try to simuate and emulate whatever I can do at home .
By doing this I have kept my orchids alive and healthier then ever before. So Foliar for me is a boon, I got wonderful results with my young Cymbium's first winter bloom this last winter due to this. Why the controvesy humm?, why argue do do it if you like it, and it is not for you then don't. Some balance here and common sense makes for happier orchids and their keepers.