
Originally Posted by
Whimgrinder
Orchids in general prefer a urea-free source if nitrogen, and so many manufacturers have engineered a formula specifically for Orchids to address this need. Miracle-Gro is generally the junk food equivalent of plant nutrition, but if its all you can provide, it will suffice, but will prove less than ideal. Why? Because urea based fertilizers require the action of soil bacteria to turn the urea into usable nitrogen, and orchid media generally don't support the bacterial life needed for the task. So, choose urea free for orchids.