To be honest, if pot size is correct and soil type is correct, you can get away with not checking your fert pH (as long as you are using a pot fert, and NOT orchid or azalea food!!! ).
6.2 is WAY too low for soil. 6.6 is the absolute lowest I would ever feed, because you run through your lime SO fast going too acidic, and given the choice, in a peat-based medium, I would just feed with tap water plus fert that usually seems to come out around 6.9 with my city water.

I think that plant needs to be re-potted like, last month, lol.