With all due respect, most growers have debunked the notion of orchids growing in bark need a high nitrogen fertilizer. The feeling being that orchids couldn't handle it efficiently.
A great many growers who fertilize monthly or even weekly use a balanced blend fertilizer believing it is more beneficial. Something like 18-18-18 or 20-20-20.
Also there is not much point in fertilizing frequently without much of a root system.
