Tips turning brown - HELP!

[Deepstuff]

Hi
Nearing end of 4th week of flowering. SFV OG Kush indoors, in Promix using GH neutrients. Under LED QB Lights.
Tips are turning brown. Should I be concerned? Using neutrient bloom recipe on GH bottle. Could it be neutrient burn, light burn, cold, or too dry before watering? Humidity is held between 40 and 55%, temp at 27C during day and dips sometimes to 16-18C at night.

 

[Grownsince95]

The slightest bit of tip burn...no biggie. That's how you know you've fed them enough ❤❤

I get it on every grow

Beautiful plants! Welcome to the Farm.

 

[Westpsy]

Hi buddy, I'm having the same problem my Humidity 47 / 58 Temp 24/ 26 light led 60 cm high biogrow 2ml in 1 liter

 

[Grownsince95]

Yeah make a note in your log of what week/how much feed and go slightly less next run with that strain. And less is always more with plants.

 

[Westpsy]

I think My problem is different
Another photo with normal light

 

[Grownsince95]

Hi buddy, I'm having the same problem my Humidity 47 / 58 Temp 24/ 26 light led 60 cm high biogrow 2ml in 1 liter

Yours look a little more advanced than the OP so go easy and same advice as far as I can tell. Hard to see with blurple lights

 

[Grownsince95]

I think My problem is different
Another photo with normal light

First impression is that the PH in those plants medium may be off. You've got some there front and back with possible N issues also. What are you running? Need info

 

[Westpsy]

First impression is that the PH in those plants medium may be off. You've got some there front and back with possible N issues also. What are you running? Need info

My ph is 7 and only feeding by humic acid and now only biogrow

 

[Grownsince95]

Gotcha. Im a coco/hydro grower only. I don't want to give you bunk advice. Plenty of amazing soil growers here that can help though.

 

[Beachwalker]

Could be an early potassium deficiency or lockout, recommend a slurry test and post results

Soil Ph Slurry Test - Step By Step With Photos

Knowing the pH of your growing medium is important from time to time. The soil pH slurry test is the easiest way of finding the true pH level of your soil based growing medium. For this you'll need: pH Meter - Cheap Amazon pH Pen - Blue Lab pH Pen - Blue Lab Soil pH Pen Cup or Container -...

www.thcfarmer.com

 

[Westpsy]

Could be an early potassium deficiency or lockout, recommend a slurry test and post results

Soil Ph Slurry Test - Step By Step With Photos

Knowing the pH of your growing medium is important from time to time. The soil pH slurry test is the easiest way of finding the true pH level of your soil based growing medium. For this you'll need: pH Meter - Cheap Amazon pH Pen - Blue Lab pH Pen - Blue Lab Soil pH Pen Cup or Container -...

www.thcfarmer.com

Hi buddy, tnx but I dont think there is a problem with potassium because other plants do not have this problem, but I will measure the pH of the soil.

 

[Aqua Man]

Looks that way to me also.... potassium very early. Usually its an imbalance in the soil or to much calcium or phosphorus. Overwatering slightly can do that also.

 

[Westpsy]

Looks that way to me also.... potassium very early. Usually its an imbalance in the soil or to much calcium or phosphorus. Overwatering slightly can do that also.

Tnx Should I stop fertilizing?

 

[Grownsince95]

I knew the soil gurus would save the day Makes me think I could give it a shot eventually with all the amazing help here at the farm!

 

[Aqua Man]

I knew the soil gurus would save the day Makes me think I could give it a shot eventually with all the amazing help here at the farm!

No soil guru here but plant response to a deficiency is the same for all media.

OP this may sound odd but if you just keep the GH balance portions start to finish you should be good. Stick to transition ratios and just adjust concentration of ppm, and maybe the last 3 weeks shift to the bloom ratios. IMO they cut to much nitrogen and add a bit to much PK. This is my opinion only.

What source water are you using?

Are you using cal mag and if so how much?

 

[Aqua Man]

That or feed the first 3 weeks of flower transition at least.