I use either a 12-1-1 or a 9-1-1
both have a long, long list of macro and micro nutrients.
Calcium is 8, magnesium is 2, copper, boron, zinc, all on the list.
Never been happier. I do not change fertilizer with the seasons, just the concentration.
In all honesty, I usually don't answer fertilizer threads, because I get frustrated with the time it takes to explain the why behind what I do. Basically, everything you know about fertilizer is wrong.
Or to phrase it differently, all the information about fertilizer written for hobby growers is wrong. Recycled information from 1890's England research.
The information published for commercial potted plant production is correct, and basically is what I follow. Go to Michigan State University website, find the articles on research for the potted plant production trade. In particular, look at articles about fertilizing "plug" plants. That is basically what I use - Michigan State University formulation fertilizer. MSU for short.
See, haven't said more than half a sentence about why, and I am already at half a page. Look it up.