I think I added a little to much worm castings on my soil... now I don't know for sure when I shold feed. I have a journal... if you could give it an eye, and a thread ipened in Organics section but I was told to search here.
Got pics ????
BTW you really cannot overdo worm castings.
It helps condition soil and is always a good amendment . There has been growers on this site growing in full worm castings. ( not my choice but they did it ).
In my experience I always get a little N tox when using castings and peat based potting mix.
I once top dressed on my usually feeding regime in flower and got N tox day after.
I suspect the castings have a readily available source of N and other nutrients before needing to be broken down.
Just my experience