Anyone has any idea what this might be? Leafs turning brown

[josevi]

They are grown in coco and I have been watering them with water pH 5.8-6.3. The nutrients that I have been using are the Tripart GHE nutrients at about 75% the recommended dose. I did suffered from a thrips infestation, but I already solved it. I honestly have no idea what is this. Any insights are appreciated.

 

[josevi]

Bump because I still have no idea what is that :(

 

[josevi]

Bump :(

 

[Dirtbag]

They look a bit overfed. Do you have a ppm/ec meter?
How much coco are they in how much/how often do you water? You get good runoff?
I'd be curious what the runoff ec is.

 

[josevi]

They look a bit overfed. Do you have a ppm/ec meter?
How much coco are they in how much/how often do you water? You get good runoff?
I'd be curious what the runoff ec is.

Thanks for the reply. There is about a 10% runoff when I water them. The medium is about 85% coco and 15% perlite. I did flush them before turning to flower, so I was a it skeptil in thinking they were overfed. I will give them flush them again, I guess.

I do not have a ppm/ec meter atm.

 

[josevi]

They look a bit overfed. Do you have a ppm/ec meter?
How much coco are they in how much/how often do you water? You get good runoff?
I'd be curious what the runoff ec is.

Just realized I missed some details. The plants are on 11L pots and I water about every 3-4 days using nutes at 75% recommended dose.

 

[ComfortablyNumb]

Overfed, Under watered maybe.

 

[tobh]

whoa whoa whoa.... you're in coco and feeding every three or four days?!

you need to change that immediately. multiple fertigations a day. that's classic nutrient burn, hands down. bet your runoff is insane, upwards of 3+ EC. you cannot treat it like soil, and you'll be rewarded for more frequent feedings. run a flush of at least 3x the media at 1/4 strength nutrients until the runoff matches input, then feed at full strength and keep a better schedule.

 

[tobh]

and get some basic tools. $20 will get you a pH and EC meter on amazon. they aren't great, aren't terribly accurate, but consider them to be like a flashlight in fog. at least you'll have a rough idea of what you're giving your plants.