Since no one has weighed in so far... the N % is low and there's no P or K listed, so you might want to use this along with a regular orchid fert. Just add the N% here to the N% of the other fertilizer to get an overall level. Remember that high N levels promote green vegetative growth rather than flowering. The micro's (the other elements besides N, P, and K) seem fine, except you'd want to test the pH of your substrate since you have 6% iron (iron sulfate?), used as a micro but also to keep pH low. Most orchids like pH between 5.5 and 6. Iron lowers the pH. What I would do is add this fert to a low N fert such as a 10-30-20 that also doesn't have too many micros. Then I would use a quarter tablespoon if you water weekly weakly or up to a full tablespoon for monthly fert. depending on the type of orchid and its substrate. Now all this is just my considered thinking (an ecologist and NOT an orchid master).