Is within special Fertilizer for Evergreen Coniferous Trees? I am using a product called Miraco-Grow (10-10-10) where on earth...

I am using a product called Miraco-Grow (10-10-10) where on earth i attach it to my water hose and , by bearing of mixing its fert with marine, i spray the mix onto the soil of the tree AND its brances. I do this once a month (or possbily once every 2 months)

Is there a special type of fertilizer or is this well-mannered enough for these types of trees?
Answers:    miracle grow make several kinds of fertilizer spikes, They hold all purpose, evergreen, tree and shrub, and fruit& citrus. These singular have to step down twice a year, in april and september which is easier than have to go out every 2 weeks next to the liquid fertilizer. I've used every nice except for the fruit/citrus on various trees that I hold and they work well.