Hey all,
Is this magnesium deficiency?
Soil is Coast of Maine’s Stonington Blend at 7 pH which was amended with 1C dolomite lime per 1.5 cu’ and some extra perlite.
Plant is a Mazar auto from Dutch Passion.
The other three BlackBerry Kush’s in the tent using the same soil are not showing these symptoms.
If it is mg deficiency, my plan was to use some epsom salt in their next watering, as well as some ulsulphered blackstrap molasses… thoughts?
Thanks! 
Looks like thr start of it. Why did you amend with D Lime? Its super helpful for those with low pH but if its already in range (the soil) then it can send you a bit too high.
The reason I ask is that plant looks kinda young for mag deficiency in soil. Id love to hear your latest runoff values at least.
All the same, epsom salt will fix up a magnesium deficiency pretty easily
I’ve read that Coast of Maine have Cal/Mag issues and I use RO water so I added the d lime.
Also read that Lime would only raise my pH to a max of 7, which is high but not too high(?)… Seemed like a good way to organicly add some Cal/Mag.
Been lazy and was using a cheap soil pH meter which some say work, others say don’t. I have a good one I used for hydro that I’ll make a dirt soup with tonight and test…I wonder if it is the pH?
Lets see how the slurry (soil soup) reads up.
The epsom and water (pH’d properly) shouldnt hurt too badly either way
Hi🥰
I’m all apologies if i am wrong to you here, guys, but i feel in my gut that your plant would fair better if the pH would be a teensy bit lower, like 6.3 to 6.8. My little growing experiences when following a select few on youtube have demonstrably shown me that was an optimal range. I wont say the only acceptable range but definitely want it a shade below 7 to prevent nutrient lockout. Given that 7 wont lockout ALL nutrients, but could perhaps block some that could be your problem. Good catch on that, btw. Magnesium is as essential to plants as iron is to animals. In fact the only difference between hemoglobin and chlorophyll is the metal ions in the middle of a porphyrin skeleton. Sorry if thats regurge as info to you, i just thought that that was so cool.
That’s definitely a valid point! The tenth of a number off is closer to exponential (multiples) then sequential (regular counting). So being off .2 can make or break a plant.
If you do the epsom snack, try to pH it to the lower end of the soil spectrum (6.3)
Any tips on how to organically reduce pH in the soil?
That’ll definitely do it. Be very lighthanded though. Normally the problem with soil pH is its too low, you dont wanna swing it too far.
And normally when I make a solution, the solution is pretty low pH wise. I can count on one hand the times ive used pH down in 3-4 years
what I was thinking as well 
Well, tested twice and the pH of the slurry is at 7.5
My RO water is at 6.4 pH, but last Sunday I used water from my fish tank which I just tested and the pH is 8… I wonder if the higher pH fish water pushed the already high pH soil over the edge for the Mazar?
Next water will include some citric acid… a tiny pinch in two gallons should be all I need? Haven’t been able to find much info about it yet.
Thanks again all.
Do you have PH down?
I don’t think you can accurately test PH in water with less than 100PPM Someone correct me if I’m wrong
I would also check the calibration of your PH meter
I don’t have any pH down…just donated all the bottles I used for hydro to a local shop lol. Can get some more if that’ll be easier/more stable.
To make the slurry I made some mud with RO water and occasionally mixed it over the course of a half hour. I then used a coffee filter to separate the dirt from the water and took the reading.
Calibration should be fine(?). I stuck a new probe on my Aspera SX610, calibrated it, ran the test, calibrated it again, and ran the test again…both times it read 7.5.
I have been using citric acid as needed for a couple of years. I bought a $4 container from Wally World and use a small pinch to a gallon.
A more accurate slurry test would need distilled water and the mixture rest for 24 hours
Did tests on all four of my 5G pots using distilled water, all are reading 7.3- 7.5.
I’ve read that the critters in organic grows provide pH buffering which is neat, but not when the pH is off.
I’ve watered a couple times since last week with 6.5-6.7 pH’d water and still got the readings mentioned above.
Is there something I can do to lower the soil pH and not just the solution? Not quite grasping something here.
Could I saturate with with a strong acidic solution like vinegar and water at 6.4 pH, wait a day or two and re-water again with recharge to get the microbes going again?
Is this grow boned?
Ironic… added the dolomite lime to increase cal/mag, and ended up locking it out lol
Thanks all.
I’m not sure what to do here but whatever you do not use vinegar it will likely kill your plant! Atleast this is what I’ve picked up from multiple reading over the years! I personally would not risk using it.
I hope you figure it out man! Good luck 
To clarify - something like apple cider vinegar diluted with water to a pH of 6.4 to saturate the soil and maybe ‘cook’ it into acceptable pH range over the course of a couple days?
Just not understanding how to get the soil itself to acceptable levels?
Apple cider vingar can act as ph down in a pinch
