Think Differents in trouble I think... Help!

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Hello!

I growing 3 TD and 1 GhazeXC99XC99 in a 80X80 box with scrog under 250W HPS.
The Ghaze is fine, but the TD's are browning, and yellowing. They are in day 45.
10L airpots in plagron allmix. I watering them with 0.5L in every 2 days.
I feed them with biobizz autoflowering supermix, and epsom salt. They are in 20/4.
Pls Help! Thx in advance!
Here is some pics:
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I take some shot, with a good quality camera, when the lights off.Getting worst...
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I have no idea, what should I do. I try to figure out myself. If its really Ca def (what I think to) , I give them a broken crumbled egg, and I dissolved some Ca effervescent tablet
PLS HELP MY LITTLE LADYS!
 
Hey botlowsky,

A few things I notice right off the bat, but first a few questions.

1. What is the ph in and runoff?
2. I don't think you are watering near enough. Those are smart pots you are using and they appear to be brand new. By day 45 I should be seeing some signs of runoff at the bottoms and around the sides of those pots. If those are 10 liter pots those plants should be getting a minimum of 2 liters. I run 5 gallon smart pots (~19 liters) and water every 2-3 days @ 4 liters. That being said, I doubt you are getting enough runoff to measure ph. You are probably getting a build up of unwanted salts in the soil.

Lastly, that definitely looks like a phosphorous deficiency.
First thing to do is check runoff ph. Water the plant slowly with plenty of ph'ed water @ 6.6. If the ph is in a good range, 6.5-6.8 then boost the P going in. If the ph is out of range, correct immediately. If it is bad out of range +/- > .5 then flush 3x the pot size (30L) with water @ 6.6 then feed at half strength. If it is less than .5 out you can correct without flushing by adding the difference to the next watering. Say you are at 6.3 runoff, then on your next water or feed, water at 6.9 to correct the soil conditions. That should put your runoff around 6.6.

Best of luck bro, keep us updated here.
 
Thanks Man!

Prity intresting. I watering them with a mix of nute, rainwater, and tap water for the ph ballance. The PH is 6.7-6.8, when I watering.
When I give them 0.5L its runoff in the side of the pot (somewhere in the bottom side). In my firs grow I grow in 7L pots and watering them every day with 0.2-0.3L, and I fighting with overwatering problem, thats why I figure out this 0.5L watering in every 2 day.
And maybe its a stupud question, but how I can check the runoff PH? Because If a watering them the water is run out in the sides after 8-10 second. I check this water PH?

p.s.
I give them 1L /each right now. The water what runoff in the sides is around 7.0-7.1....
Should I remove the brown dryed leafs?
 
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Wow, you are getting runoff with only .5 L? Are you watering very slowly? Do you have any amendments in the Allmix that you added. For example perlite or anything that would cause such quick runoff? The soil should be holding more water than that. Also, you would be waiting to water until the top 5cm of soil is dry if you were having problems with over watering.

Your ph is a little high, should be down around ~ 6.6. On your next watering/feeding I would ph at 6.0. That should drop your soil range in ~6.6.

Yes, the easiest way to check the runoff is to put your plant on some type of bowl, platter when you water/feed that catches the runoff and pour it into a clean cup and test. That will tell you your soil ph.

You can remove the brown leaves if you want, it won't hurt anything. If you remove, make sure to remove them about half way down the stem. Leave about half the stem on the plant, it reduces the risk of infection.
 
Thanks again!
I watering them 1L / each. (2 X 0.5L)
I dont add anything extra, just the plagron almix, what I buy in a grownshop.
This is the first time, when I check the runoff water. I give them (when I see its high) 6.2 PH with plagron alga bloom (high P).
 
Hey botlowsky ..couple of questions, How much feed are you using per litre, and what is biobizz autoflowering supermix, is that BioBizz and Autoflowering SuperMix?
 
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