Burn or defficiency? pics.

I'm not sure whether this a nute burn from the soil, or a nute defficieny.

Here is the soil.

View attachment 1041141

Slow release nutes, etc etc. But it doesn't really seem to be strong enough to burn the plants as badly burnt as they are.

Here are the plants.



As I haven't fed any fert to my plants, im guessing defficieny, but I could be wrong. Any input would be extremely appreciated

cheers

Looks like mag to me but im no expert. Have you been phing your water? IF not then you could be locking out something. For soil your ph should be around 6.3-6.5. Do a soil test and see what the ph is. IF it is lower than 6.2 then add some cal mag with 6.8 ph water and it should solve your problem (follow the directions for fast acting soil application. It may take 2 feedings.) . If you dont have a means of testing ph then you MUST aquire one. Even a cheap soil test kit will be better than nothing. If you PH is not low just add a complete nutrient. IF your ph is high then flush with lower ph water. Hope this helps

if its a clone then its prob too many nutes that slow release stuff is not good cant controll it get good dirt fox or roots organic and good nutes