There is no such thing as a bloom-boosting fertilizer for orchids. That is nothing more than a myth perpetrated by marketing folks.
When it was first recognized that orchids are particularly demanding of nitrogen, the late Dr. O. Wesley Davidson of Rutgers University, invented Mir-Acid (30-10-10), the first chemical fertilizer, and the plants responded well, so the orchid community jumped on the band-wagon heartily.
After a while, however, it was noted that plants were not blooming as well as they had. Realizing that to be due to over application of nitrogen, they diluted it in their formula with inexpensive phosphorus compounds, and dubbed it a "bloom booster", when in reality, it didn't "boost" anything, but "allowed" the plants to bloom by limiting the nitrogen.
Orchids are actually not particularly demanding of nutrition. That Orchid Focus product looks to be OK, although lacking in magnesium, so I'd recommend adding Epsom Salts to it monthly.
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