Coast of Maine stonington blend

I am building organic soil bed for outdoor grow but I wanna keep mothers for clones and all I have atm is coast of Maine stonington blend and lotus pro series cal mag. Go all organic honestly and I plan to get earth dust to go that route but what do I need to pair along with the coast of main fertilizer to make sure my plants receive everything they could need because I believe just the coast of main fertilizer I will have deficiencies of some sort

I've been using it for a couple of cycles now. I top dress with
tsp of blood meal 1wk before flower
1tbsp of bone meal 1st day of flower

Also found it to be lacking magnesium and potassium. I use cal mag, and molasses that has been boiled with banana peels and a pint of water for 10 minutes. Thinking about switching to langbeinite though, since it also provides sulfer