AutoBlackBerry Kush is getting yellow :(

[Joehell]

I am growing 2 DP AutoblackBerry Kush under 2 MarsHydro Reflectors. What started of as looking like some CalMag deficiency seems to be getting out of hand. Been ill last few days and didn't pay much attention to them, just regular watering/feeding. Suddenly on one of em most leaves on the mainstem are yellow. I am basicly using Tang's schedule. Both of em are at day 45 orso. I don't what is happening? This is how they look now:


This is what they looked 7 days ago.

 

[shagger]

I have the same problem mate am on day 50 its all going on bro

im doing 3 auto blackberry kush only 2 have actually gone purple and 3 auto ultimate all three at back have gone yellow there on 2litters each of tangs new feeding schedule every couple days not sure if a flush would help or make them even more yellow theres brown patches on leaves and really pale yellow also got some crunchy leaves but the sugar on them are good and the tent smells amazing any help on correcting this problem would be awsome for the future as i think its gone to far to all go green for harvest lol

 

[Kakarot]

I hope all goes well bro and they get well soon, and for future ref, get your own feed routine down for the future. You would be surprised Much luv man

 

[MedGrower]

Every garden is different and I am sure TaNg's schedule is awesome for some but for some it isn't. I find that in my garden so far the bloom feeds are far too strong and as I've toned them down my EC levels have stayed on level. Around 1 to 1.2ml of basenutes per litre of water has worked for me in DWC, instead of 2ml.

This certainly looks like it could be a combo of calsium and magnesium defiency. If you are already feeding CalMag, have you checked for pH of the soil?

 

[namvet25]

Did you guys use cal/mag with your feed?Some strains tend to turn yellow towards the middle of flowering and this is normal and it shows the plant is using nutrients from the leaves to feed the flowers.

 

[Waira]

Joe- The speed of that decline smacks of a pH issue, and I suspect more than one thing is in play here... lately, I've seen a few plants with very similar symptoms; I need a soil pH reading, testing method too, type/brand of medium, are you using any sort of micronutrient supplement,... (be sure your meter is recently calibrated) .... We need to figure out if you have a pH nute' lockout defc. happening, or just a plain lack-of defc.... I see yellowing at the bottom too-- do they have the same necrotic patches as the uppers? Shoot me a couple pics of those lowers please, in normal lighting/no LED; yeah, some yellowing of the lowers is normal, typically it's just N being removed to support production up top,... the upper leaves are getting hammered for sure! that's usually an indication of an immobile nute' lacking or locked out by off-pH, but not always,... Ca is one of those immobile ones, so is Boron, which was suspected in one of those recent cases I referred to,...but it's very rare, so let's see what you pH is first,....

 

[shagger]

I'm using ph perfect advanced nutrients iv done a full flush i think it had lockout and iv made a new feed up with extra nutes and more calmag as there alott taller and are drinking the feeds up fast pots get light very quickly 2L a day lol greedy bugers iv never had problems like that on biobizz nutes just this time i thought id try advanced nutes but the difference in groth and smell am happy with just these have gone yellow real fast

 

[Joehell]

I don't have all the meters and stuff. Only some liquid tester for the PH of the water. But i do think i've found one of the problems. It seemed water didn't made it to the bottom of the pot while watering the plants to close to the stem.

 

[Robin Hood Countryman]

My blackberry Kush plants r a dark green still in week 8. I'm using bio buzz all mix soil mixed with a little light mix,bio grow, bloom and top max. Buds ain't too big as plants were alot smaller than my blue widow photos, buds r purple n pink tho covered in sticky fruity resin! I've raised them up now to even out the canopy so I rekon they will fatten up now gettin more light. Id say u Av a nite lock-out, wrong pH. Do a flush with 3times as mch water as pot holds with a very mild feed, then increase feed next time. Also check pH and EC of yr run off water. Hope this helps

 

[Robin Hood Countryman]

It never lets me upload photos on this tapatalk app