Is it a fact or a widely-held and long time belief that orchids should only be fertilized with fertilizer containing non-urea derived nitrogen? This question has come up on a thread on DG the last couple of days.
Does anyone know if there is a documented study on the subject? Who would be an authority on this question? Is there data available online?
Please check your books and magazine articles, weigh in with opinions, and tell us how you fertilize and what you use. Has anyone conducted their own experiment?
I have a couple of little ones to experiment on. I'll document in pictures using regular Miracle Gro on one, and my usual non-urea orchid fert on the other. I'll have to figure out how to get equal concentration. Not controlled as my orchids are outdoors, or particularly scientific but at least maybe I can set my own mind at rest.
