Need help to diagnose plant problems

[bobetz]

Hello, this plant is two weeks old northern lights auto of seedsman.Feeding with GHE trio nutrients 3 ml micro soft water, 3ml grow, 3ml bloom ,2 drops pro roots per liter tap water -500 ppm ph5.8 including 80ppm of tap water. Run off is 600 ppm 5.9 ph4-5 days ago this brown patches started apear from lower leaves and going up.Need som help to identify the problem and advice how to proceed further.Thank you very much.

[Rwise]

Need input.
What are you doing for chlorine/chloramine?
What is the PH of the soil?
What is the PH of the water? (with additives)
What is the PH of the run off?
Have you sprayed them with anything?
Did you follow the link at the top of this page to "Plant Problems" and look for this?
"3ml micro soft water" what is this? IF this is a salt, well,

[CaptainWiese91]

Why are you feeding it bloom nutrients now?
What type of medium is that ?

[bobetz]

Thank you Rwise for your response.For hlorine i leave tap water to sit for couple of days. I use expanded coco brick with 50% perlite with autopot( still disabled) and dont sure about the ph of the medium but the ph of solution with additives is 6.3 i use ph down to set it to 5.8. The ph of runoff is 5.9 . I dont use any kind of spray.I followed the link but still not sure what the problem is.Flora micro soft water is part of general hydroponics trio for use with soft water with more calcium i guess.

[9fingerleafs]

What do You use to measure pH? The spot look like bad ph

[Rwise]

And did you prep the coco?

[YYCannabis]

Are you adding CalMag to your nutes? Looks like possibly calcium deficiency.

[YYCannabis]

Get your pH up to over 6.0 for better calcium uptake.

[Farmbuck]

I say calcium deficiency also and your ph is too low.

[Kajicky]

Try to get your PH to at least 6, 6.2-6.3 is the sweet spot I aim for. Also get some Ionic or Plant Magic CalMag to give more calcium which is a key mineral needed to promote nutrient uptake.

Also when you say you leave your water to sit for a couple of days is this in the sun? As chlorine will take a lot longer to break down than 2 days if no UV in the mix.

That’s my 10c, good luck!

[Rwise]

Lemon or lime juice (vitamin C, ascorbic acid) kills chlorine and chloramine instantly. It also temporarily drops the PH (it is acid after all), then let it set for 12 hours and check the PH again. For me what happens is the PH drops low, then raises back to where it started (tap water is buffered).

[CaptainWiese91]

This is why i never let my tap water sit for 24 hours before I use it. I been using organic citric acid for years now. And it works perfect for the PH levels. But I mix only the amount needed for that day. And I make new for the next day if they need water again.

[Rwise]

You ever wonder if the PH changes after the water is poured in the soil? This is my fear and why I let it set to stabilize.

[CaptainWiese91]

With my soil it doesn’t. I measure the soil pretty often with the Ph meter I have. So I would say my cheap tomato soil works great. My soil has a natural Ph at 5,8-6,5. So I’m not that worried. And my plants seems to hit the Ph spot from what they are telling me.

[Catfish22]

I'm growing the same strain at 8 weeks now. I had a cal mag problem due to long periods between waterings (4-5 days) right at 2-3 weeks. Add a tsp of cal mag (5 mls) per gallon along with shorter watering periods mine cleared up in a couple days. My deficiency wasn't as far along as yours though. The leaves won't get better it will be clear on new growth.
It's my first grow and I was able to figure this out by reading ALL the tutorials concerning this particular issue AND browsing/reading relative topics in the forum.
It's all here, you just have to read it.
These folks know what they are doing. Read and ask good questions including relative info about your grow and you will get more knowledge than you know what to do with!!!
Also check Nebulas nutrient schedule for GH trio in coco for autoflowers, it will get you to the finish line. Us new growers need a template to start with, then as we gain experience we can tweak it.
Nebula knows coco, that's her lane, as the kids say!!
Happy farming.

PS: I don't know where you are but I use 1 gallon jugs of mineral spring water from Walmart, store brand, about 60 cents per gallon. pH's at 6.0 plain everytime and it has done well by me.

[SoOrbudgal]

Hey there Catfish22 my hubby when he was a little boy about 6yrs old was swinging a stringer of catfish and one of the whiskers got him in his knee cap said it stung like a bad bee. Sorry to high jack your post bobetz i got a memory and i sometimes just spew it out.

[Catfish22]

Yes ma'am, been there. Got the scars! 🙂

[Rwise]

Nothing like sticking your hand in the mouth of a blue! That damn catfish clamped down (all the old guys were laughing) on my hand and flipped until it worked its way off my hand. I never did that again, and I'll never forget they have teeth!

[SoOrbudgal]

Yes like tiny razors Rwise

[Rwise]

I will never forget it, tiny cuts all the way down to the tips of the fingers!