Deficiency or Overdose? Mephisto Super Orange Haze Auto

[Aaron Thrower]

Problem: Leaves turning a red coloration

Medium/grow method: coco. 20/4 light sched. 2 gal fabric pots

Feed: and supplements used: Tangs Easy Auto Sched, Recharge, Silica, Mammoth P, Cal-Mag

water source: tap

Strain/age: Mephisto Super Orange Haze 56 days from sprout

light used: HLG 550 QB and 630 CMH (I rotate the plants between lights)

Climate: Indoors tent. Temps 75 when lights are on and 55-60 when off. RH doesn't get above 45

Additional info: I'm growing 4 of these SOH and this is the only plant that looks like this. I feed every day with cal-mag. I stopped giving it cal-mag the last 2 days in case it had something to do with it. Any help is appreciated.

 

[Tessamaria]

Maybe the PH is off

 

[Aaron Thrower]

No that can't be it because I have 6 plants getting the same mixed nutes and I check my ph religiously and none of my other 5 plants look like this which 3 are the same strain. Now it might be that this plant wants a different ph than the others but that doesn't seem likely.

 

[Kinezokyprios]

Have you measured the pH in this particular container? It doesn't matter what is going on with the rest of the plants, focus on this one. Get a pH meter and measure the soil ph. Do this for all your plants and do measure regularly especially before watering. We all want to treat our plants in a uniform way to save up energy, time and resources but each pot is a different environment.

 

[Kinezokyprios]

Also don't overdo it with cal mag supplements. Practice has proved that in soil they are not necessary, especially in your case that the temperature/humidity ratio is close to ideal.

 

[Kinezokyprios]

Sorry I just saw you are in Coco. So it even more crusial to measure the medium's pH. If you were adding cal mag every day then it must have exploded to high alkaline values.

 

[Aaron Thrower]

Sorry I just saw you are in Coco. So it even more crusial to measure the medium's pH. If you were adding cal mag every day then it must have exploded to high alkaline values.

Thank you. I had a feeling it might be too much cal mag. I started backing off of it on this plant. Yeah I get that every plant is unique in it's on way and has different needs. You are correct that I just go into robot mode and treat them all the same. I think that's because I used to always grow photos from clones so they were all equal. I'm now hooked on autos and that's all I want to grow. I'm going to need to add a soil PH tester to my bag of tools it sounds like. Thanks again.

 

[Kinezokyprios]

Thank you. I had a feeling it might be too much cal mag. I started backing off of it on this plant. Yeah I get that every plant is unique in it's on way and has different needs. You are correct that I just go into robot mode and treat them all the same. I think that's because I used to always grow photos from clones so they were all equal. I'm now hooked on autos and that's all I want to grow. I'm going to need to add a soil PH tester to my bag of tools it sounds like. Thanks again.

My suggestion is get an old fashion analogue pH meter. Very accurate, reliable, no batteries, no calibration you just stick it to the soil. It can measure water as well as.long as you don't wet the top dialer part. Prefer the ones with 2 sticks because they also measure humidity in soil. With a price of 10 euro or the like you will be sorted for years. I mean something like this

Μετρητής Υγρασίας, Φωτός, Πεχάμετρο Εδάφους - Χώματος Silverline 361447 21cm - Ergaleiogatos.gr

Μετρητής Υγρασίας, Φωτός, Πεχάμετρο Εδάφους - Χώματος Silverline 361447 21cm, Εργαλεία, Τσεκούρια, Κασμάς, Φτυάρια, Ψαλίδι Κλαδέματος, Ρακόρ Λάστιχου, Μουσαμάς, Μπουντούζια, Σφήνα Σχισίματος Ξύλων, Σύρμα Ανθοκομίας, Μπεκ Ποτίσματος, Σκαλιστήρια, Εξαερωτήρας, Σπάγκος, Πότισμα Γλάστρας...

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[Waira]

AT, the lights are making it look more like dead patches, are they purple-red for sure? It doesn't look like it,... get me pics in normal light please...
Either way this is likely a P defc., the question is if it's from a simple lack of, a pH lockout (too acidic), or an antagonistic uptake issue from the Ca.... too much can screw with the uptake/availability of P...
How much Ca-Mg went in?-- dosage, frequency
Are you running this coco drain-to-waste? Coco can't be treated the same a true soil, it's very different with a lot of do's and don't's... Never let it get any kind of dry, daily feeds with about 20% run-off each time... check pH and ppm going in and coming out each time, this is how you keep nutes salts from building up and monitor pH in-pot.... I suspect you haven't, and it could be it's overloaded in there causing the problems,.. Do you have a TDS/EC meter?
Are you using any bloom booster, high P-K stuff besides just the base nutes?
AN's "pH proof" works in solution only, not once in the pot, too many other influencing factors in there,...
The tip about a soil pH probe is wise, but avoid those skinny, multi-purpose units, they have proven to be unreliable... Check out the Accurate 8 soil pH probe (Control Wizard products); this unit has served me well for years now - ...yes is can work in coco, but if you're running coco like it was meant to be (soilless are more like hydro mediums; coco is, straight up) you don't need one because of the reason above... never hurts to have around though!