1st full indoor. (Accidentally erased)

I see

It needs NPK especially N

They all have WPM

So ur plants are in week 13 of flower yah i would say the plant is using up the nutrients in the leaves starting to fade but having a look at one of ur pics it looks like you have mould problem happening

It's at about this time in a grow when all plants start needing a whole lot more P and K and less N than you've been giving during veg.... What this is showing is a pretty good P&K deficiency (mostly a phosphorus deficiency) perhaps brought about by a nitrogen toxicity which has locked out those other terribly important nutes. I have no idea what it is exactly that you're feeding but the NPK ratios ought to be about 1-5-4 ... your EC is good, could/maybe SHOULD be higher ... and your pH is also good - just juggle around with the ratios.

Good luck.

So that isn't nutrient lock out.
I want to stress that get a better nutrient line for your plants. Something more gentle and easier to mix at lower ratios because that stuff is...I'm not sure.
The best way to fix an overfeeding is to just water your plants thoroughly for the next week or two careful not to drown them. Although your plants needed more nutrients to begin with so I would just see how they respond. They have a lot of old damage on them so it's kind of difficult to tell if she's getting better or worse.
Also the white soap scum looking stuff in your leaves? Try whipping it off with a wet cloth. Just curious.
Hope this helps.

Both those fertilizers are NOT SUITABLE at all for cannabis.
For growth you want something around 6-2-4 and for flowering something around 4-4-6 for general feeding, supplemented with some cal/mag and a P/K booster for flowering.

I would say your plants are suffering from toxicity due to a nutrient salt build up in the substrate.
Plain water for a week then resume feeding with proper cannabis friendly nutrients would be my suggestion.
The older damaged leaves will not recover, but this should help prevent things getting much worse, although generallly, what is ahowing now in the leaves, is a reflection of what was happening in the soil two weeks ago, so things will probably get worse before they start to improve unfortunately.

But getting the correct type of fertilizers for cannabis growing should be your first priority.

now I can understand better...
"During the vegetative phase, cannabis requires an NPK ratio of 3:1:1. However, that doesn't necessarily mean that you should feed it a fertilizer with that ratio. “quote.
let's say 20-20-20 is a bit too much for our plant to do well it should be about 60-20-20
” A highly effective NPK ratio for beginning to mid-bloom is 1:3:2, followed by 0:3:3 for the remaining flowering period. “
you have a 9/58/8 ditto as above in your case a 9-27-18 would be fine and then switch to a 0-27-27
these data are with the right proportions calculated with that type of fertilizers
remember one thing an excess of a fertilizer can lead to a subsequent deficiency
” Phosphorus poisoning occurs instead when Cannabis plants receive too much of it, and it is often caused by inexperienced growers who administer too much fertilizer to their plants during flowering. If exposed to an excess of phosphorus, cannabis plants will suffer burns from fertilizers, characterized by these symptoms:

Leaves with a burnt appearance and sometimes with spots
Yellowed leaf ribs
Curled tips or edges of the leaves” cita
I hope it will be useful to you because to search for everything I have put in Half an hour :muscle: