Help with yellow tips first grow

[alreaaaa]

Hi guys It's my first grow and here's the setup

300w led galaxyhydro (130-150w)
plagron lightmix soil
fox farm trio for nutrients
60*120*170 cm grow space

temps goes between 16C to 21 - 23C
RH goes from 46 to 60

Think Different is the strain from DP
They were really slow due to low temp I guess now is day ~80 and they're flowering for like 2-3 weeks
I have a problem with yellow tips which I suspect is copper deficiency but PH looks OK, monitored every time
I used reaaaally low nutrients but maybe still too much ?..

 

[Renaissance Redneck]

Hi guys It's my first grow and here's the setup

300w led galaxyhydro (130-150w)
plagron lightmix soil
fox farm trio for nutrients
60*120*170 cm grow space

temps goes between 16C to 21 - 23C
RH goes from 46 to 60

Think Different is the strain from DP
They were really slow due to low temp I guess now is day ~80 and they're flowering for like 2-3 weeks
I have a problem with yellow tips which I suspect is copper deficiency but PH looks OK, monitored every time
I used reaaaally low nutrients but maybe still too much ?..

What is your pH at, @alreaaaa? And are you testing the soil or just your solution?
Cu isn't very mobile in the plant, and a def is usually a sign of pH issues. Are your leaves turning dark, like a blackish or deep purple? Unusually shiny or stiff?
Another thing to look at is bleaching or tip burn from your lights. How close are you running them?

 

[iWumbo]

This looks like potassium deficiency in my opinion
Similiar to Nutrient burn potassium deficiency usually starts at the tips and can be yellowish , tan, gold .

Are the leaves afflicted by this starting to get crunchy at the tips and turning brown and can spread down then leaf eventually crumble ??

potassium deficiency can look like nutrient burn. The way to tell apart is the edges of the leaves will also start turning brown, where nutrient burn usually only affects the tips ... potassium deficiency turns yellow tips and burns the sides of leaf
Can you post a few more pictures of leafs that have it

Hope this is understandable and helpful. Cheers

 

[Waira]

this is some early nute burn guys, Cu defc. is rare, and doesn't fit these symptoms... yellow tips, minimal at the margins, all over the plant,... Al'- what are you feeding at now, full strength? nutes are fine, but fairly strong, so reduce the concentration for now,...

 

[alreaaaa]

What is your pH at, @alreaaaa? And are you testing the soil or just your solution?
Cu isn't very mobile in the plant, and a def is usually a sign of pH issues. Are your leaves turning dark, like a blackish or deep purple? Unusually shiny or stiff?
Another thing to look at is bleaching or tip burn from your lights. How close are you running them?

I used to test the water only since I was unsure I could stick my PH hen inside the soil and get an accurate reading
I tested it now girls just woke up and It's the good guess I think because both pots were above 7, like 7.3-4.

I ran last watering at 6.3 and used to water between 6.2 and 6.5 . Runoff always seemed to be within 6.6 - 6.7 range

As for feeding, I use a reaally low amount of nutrients never above 2ml/l and last watering was ran with 1.2ml/l tiger bloom 0.7ml grow big

My tap water is quite hard within 7.9 - 8.5 range

Led is running at 40 cm from top

This looks like potassium deficiency in my opinion
Similiar to Nutrient burn potassium deficiency usually starts at the tips and can be yellowish , tan, gold .

Are the leaves afflicted by this starting to get crunchy at the tips and turning brown and can spread down then leaf eventually crumble ??

potassium deficiency can look like nutrient burn. The way to tell apart is the edges of the leaves will also start turning brown, where nutrient burn usually only affects the tips ... potassium deficiency turns yellow tips and burns the sides of leaf
Can you post a few more pictures of leafs that have it

Hope this is understandable and helpful. Cheers

This is understandable thank you and maybe I have a problem with potassium too for I was actually having a hard time 2 weeks ago trying to guess between either light burn nutrient burn or potassium def, when i watered a litle more nutrient (for i had been giving only ph'ed water for 2 round) it went better, I had these yellowing spots you can see plus one or two leaves getting really dark and twisted on some parts .

this is some early nute burn guys, Cu defc. is rare, and doesn't fit these symptoms... yellow tips, minimal at the margins, all over the plant,... Al'- what are you feeding at now, full strength? nutes are fine, but fairly strong, so reduce the concentration for now,...

that i'm wondering coz as I said I am only running low concentration nutrients for now and do not plan on using full strenght since i'm not so familiar with growing

 

[Renaissance Redneck]

I used to test the water only since I was unsure I could stick my PH hen inside the soil and get an accurate reading
I tested it now girls just woke up and It's the good guess I think because both pots were above 7, like 7.3-4.

First off, never put your pH pen in soil. The bulbs are very fragile, and very sensitive. To test soil directly, you need something like an accurate 8 meter.
Waira made the point I was trying to. Cu def seems highly unlikely.
It sounds like you're feeding at a little over 1/2 strength, and autos can be nute sensitive. It's a good rule to start out at 1/4 strength and work up from there.

 

[alreaaaa]

Okay then thanks i will give them like 0.4 ml.l and 0.2ml /l and let you know what happen . Do you think i should give them like 6.0 phed water or continue with 6.3 - 6.5 ish behaviour ?

 

[iWumbo]

Okay then thanks i will give them like 0.4 ml.l and 0.2ml /l and let you know what happen . Do you think i should give them like 6.0 phed water or continue with 6.3 - 6.5 ish behaviour ?

Keep up with the ph water u are using now should be fine . Having the ph fluctuations can stress the plants cheers and good luck

 

[alreaaaa]

Okay then thanks for the answers guys î´ll keep you updated thanks a lot

 

[Scar17]

Okay then thanks i will give them like 0.4 ml.l and 0.2ml /l and let you know what happen . Do you think i should give them like 6.0 phed water or continue with 6.3 - 6.5 ish behaviour ?

Happy Sunday,
Something to think about, I have hard water also (7.8) I have seedlings(not watering as much as you) so I fill my watering container and let it sit. First time I filled it I adjusted the PH to 6.0 let it sit and came back two days later, the PH was 7.5. Now I let the water sit and adjust the PH right before use, I am not using any nutes.