why is my plant more yellow after fertilizing

Whats up everyone my first time doin this so, thanks for any and all help. I have a greenouse white widow plant. the lower leaves were wilting and turning yellow. So I watered with GH Flora series 8 - 1 - 10 NPK, (850 ppm). Ph 5.8 - 6.2 (My digital meter broke, going old school with the test vial) 5 hours later even more yellowing of leaves from bottom to top. Any thoughts? I really appreciate the help!!!

Do the yellowing leaves have brown spots in them? Are they curling down? What color are the leaf stems?

hey thanks for your reply, they have red to purplish stems. the leaves are yellowing with green veins the turn all yellow and fall off. Some of the edges of the new growth turn brown and necrotic one particular plant widow # 3.

Also, any advice on an OG Kush i have that has dark green leave that are curling down and inward with black edges. (seems like phosphorous) Again thanks a lot for your time

Oh crap I hope it didn't find this too late sorry for the lengthy wait. What medium are u growing in? How much ferts r u giving them? How old r they? Kinda sounds like it may be a zinc or copper deficiency, and u certainly have a nitrogen deficiency. U should try bumping ur pH up between 6.5 & 7.5 u may also have a magnesium def as well I'd get a spray bottle with pH 7 water in it and put 1/4 tsp Epsom salt in it shake really good try to get room temp water and spray the under sides of the leaves. Also I'm not familiar with ur ferts but u may wanna look on the bottle and see if it contains trace elements. If not ur gonna have to go and get those. As for ur og kush it sounds over ferted I'd water them with plain water for a week with one feeding of 1/4 strength ferts some where closer to the end of the week. Again bump ur pH up. Check ur run off as well for all ur plants and let me know what it is. Hope this finds u in time. Sorry again

Thank you so much for your info. I am sorry for my late response
I'm growing in miracle grow moisture controlled potting soil. They are in their 62nd day of flower they were moved from outside 5weeks ago into my new grow room. I think I may have found a mixture that works using the general hydro flora series line of 6ml of micro 2ml of grow and 8 ml of bloom per gallon. The ppm is about 800. It really fattened up the buds and diminished that yellowing. Ph is huge! Thanx for reinforcing that importance. Yea the og Kush by devils harvest won the cup and once it get what it likes it's another big producer (hopefully) thanks again