I have been using coco now for 16 years mixed with chunks of coco husk.Are you in soil or coco?
I like soil because it acts as a buffer and supplies trace elements, but I don't have much experience with coco
Its very forgiving if you over feed you can flush it out and get back to square one instantly.
Soil is great if outside in the sun but for faster growth and flowering I love coco and coco nutes by canna.