H.E.L.P. To Notice

[UniGrower]

My buddy is growing these 12 Spanish type they won't tell him the name cause you know the type lol but looks like maybe nute burn or such but need a more detailed look they usually fee 800 PPM but have only been now @ 400PPM so we have flushed them twice now with 5 gallons each to try and help.?????????????????

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[Olday]

Hard to tell from the pics but it looks like only the random leaf is affected so maybe some weird hot spots in the soil? As far as PPM, if he is using a meter he may want to double check that it’s calibrated and get a PH reading of the runoff water. They don’t seem to look that bad and it may be a case that there is enough food in the soil for now, not sure what he’s using.

 

[UniGrower]

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[Blackbart]

Looks like a nute burn to me Uni . I have done this myself from too much salt build up in my pots . A good flush a few times will help . I also advise to flush with PH corrected water

 

[MORCHEEBA]

ive had them look like that when growing in coco, i let it get too dry and didnt do a flush afterwards and got crispy edges on the leaves from nute burn.

 

[UniGrower]

COCO

 

[Butcher Bob]

Also consider humidity. Given the time of year and your location, outdoor RH levels are probably consistantly low. When that air comes indoors and gets heated up, RH levels will drop even more. The low humidity can cause moisture evaporation from the substrate, which can concentrate the salts within. It will also cause the plants to transpire more, which means more of that concentrated food in the substrate will be moving through the plants, further concentrating there as moisture transpires out the leaves. Not a cure-all...just another aspect to consider along with all the other good info that has been provided. :)