New growth turning brown

[Awg52]

Problem: some older growth and some newer growth turning brown. Fed as normal in the morning and only thing different was set up new carbon filter & fan

Medium/grow method: biobizz all mix potting soil

Feed: and supplements used: only PH water 6.5

water source: tap water with biobizz ph up to get 6.5 ph

PH in the root zone: not tested (note to self must test lol)

Strain/age: fastbuds purple lemondade , 26 days old

light used: Mars hydro ts600 , 24/7 and around 18/20” from plant

Climate: usually 26/27celcius as it stands humidity is usually between 56%-65%

Additional info: with the lowest ranches that the leaves have totally browned, can I cut them off or just wait for the plant to kill them off?

 

[Cannagus]

It seems to me that has just about got to be nutrient burn, I can think of nothing from any deficiency chart with the same appearance as that. That it apparently came on quickly and got into newer growth at the top might support that diagnosis. Since you haven't changed anything I'm wondering about the possibility that watering methods/practices have allowed nutrient to build up in the medium. If I'm correct I suppose you will see this problem get worse before seeing any improvement, and aside from giving plain water a time or two and making sure to wet the entire pot, I don't see a lot you can do besides watch and wait for whatever happens next.

 

[GoodSmoke]

Im thinking the same, seems you overdid it on something, could be the other way though. https://www.loudclouds.co/plant-nutrient-deficiency-chart/ check this out, im looking at it now.

 

[Arthur]

Odd, seems it's all relegated to one branch, or side... and only on the downhill side of that...

Nute burn I would expect to see evenly distributed across the plant..
All the other branches look fine (actually happy), all the other leaves are up and praying....
Possible that side was up against the wall of the tent?

I'd trim the damage away and move on with a watchful eye.

 

[Awg52]

I started them in biobizz all mix which hadn’t known at first was too hot for autos, this one road out the original shock of the nutrient rich soil but I guess even after a few flushes of PH water there’s still too much nutrient in the soil?
New grower so I’m surmising tbh, I’ll let her go as the rest seems pretty healthy and pray she overcomes it lol

new medium required next grow for sure