What causes this?

[Canuck3]

Is this a calcium deficiency? Or nute burn? Only happening on one of my plants right now. All different strains.

Thanks!!

 

[HydoDan]

Looks like burn too me..

 

[hotrodharley]

Mos def burn. Dark green curved leaves say too much nitrogen.

 

[hotrodharley]

DO NOT FLUSH!!!!!

 

[Joncoh101]

Thats a PH issue I reckon

 

[Canuck3]

Mos def burn. Dark green curved leaves say too much nitrogen.

Interesting it's just showing now. I'm 5 weeks into flower, top dressed with gaia green bloom 5 weeks ago, and recently started to water 1/2 strength with a liquid organic bloom nutrient thinking the gaia green must be close to used up. I'll back off on the liquid fertilizer on this girl for a bit.

Thanks everyone, much appreciated

 

[Canuck3]

Thats a PH issue I reckon

Possibly, but the other plants are all happy and healthy. But could very well be this one requires something more (or less)

 

[Joncoh101]

PH is the most deceptive biaatch around. It is quite possibly the most common issue.. not even only amongst novice growers!

 

[Canuck3]

PH is the most deceptive biaatch around. It is quite possibly the most common issue.. not even only amongst novice growers!

I gotta admit, I've never actually tested my ph before lol. But I've heard others say the same as you. Where we live now the water comes from a stream on our property, from the mountains. I planted a few outside this summer and they did very well with the water, so that was good enough for my ph test lol. I may buy a tester anyway, it would be nice to know.
Thanks man