Need opinions to save my plants.

Snow White under 400 watt HPS
Week 4 of flowering 12/12
Soil / Fox Farm Ocean Forest
Fox Farm Big Bloom / Tiger Bloom
Cal-Mag
Sweet

Upper fan leaves begin to show yellow spots. The problem began about a week ago and has since spread. Ive gone from thinking it was fertilizer burn to nitrogen to manganese. I also have a super lemon haze under the same light receiving same nutrients yet is unaffected.

i would say a flush is in order. you may have locked out some nutes. it surely couldnt hurt.

yeah i would flush it asap before it gets any worse. take it outside or somewhere where you can drain tons of water with no problem. then just start dumping ph adjusted plain water into it. wait for the water to drain below the soil level and then repeat the process like 8-10 times. do this every day for a week. you should see green start to take over the yellow spots. the brown never really goes away as it is dead leaf..

Started flushing with plain water tonight. Will keep the thread updated. Does anybody know what deficiency it might be experiencing? Would it be anything my nutes in the list above isn't providing?

Erysichthon said:

i would say a flush is in order. you may have locked out some nutes. it surely couldnt hurt.

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i totally agree, this is the answer, you could have a plethora of problems, especially when the problems are uo top as opposed to bottom, i think your problems lie at the root level and a good flushing is in order, by the time 4 weeks flowering comes you may have accumulated tons of salts down there, especially if you dont flush monthly for maintenance

i dont think i would be flushing every day for a week, one good flush 3x pot volume is more than enough

not that it hasnt been said already.. but flush until ph is adjusted.. then water with a 1/4 strength nute solution... if you flush it you'll wash out all the nutes that are in the soil... so you want to replace them.. just wouldnt do full strength because if it is nute lock that plant could try to absorb whatever nutes its low on at a quicker rate than it should to make up for being starved of them and you might/could end up with nute burn... sort of like if your starving, stuff your face with food, then end up with a stomach ache.. but again thats if you water with full strength nutes after you flush and if it is indeed nute lock..

Flushed each plant twice with 2 1/2 gallons of 6.8-7.0 ph water. Did 1/2 nutrients and next feeding full nutrients. The problem has not slowed down in fact it has gotten worse. The lower leaves are now showing tons of yellow spolotches. Its only my 3 snow whites that are effected. My super lemon haze is fine. WTF?

I am mixing my nutrients based on the bottle directions.

Per gallon of water.. PH down to 6.3
Big Bloom - 2 ounces
Tiger Bloom - 2-3 teaspoons
Cal Mag - 5ml
Sweet - 15ml

Im on week 5 of flowering. I plan to flush again tomorrow. I really don't know what else to do. Would appreciate any opinions or diagnosis.

Sorry about the poor picture quality. Taken with phone.
*EDIT* Better pics on next page!!!

the same thing happened to me i tried flushing but it really didnt do anything but make sure ur ph is correct... try some epsom salt just a dash thothat will take care of ur mg problem.... good luck man id hate to see ur babies go

I hated the pics I just posted so I took some better ones. Also a close up at a few leaves. Hopefully this will help make a diagnosis.

Anyone at all???

You need to slow it down a lil. You are having a strain specific issue. Now some of the lower yellowing might be from flowering but the top is another issue.

Why the calmag and sweet? Stick the the big bloom and tiger bloom and go slow. You might be adding to much and causing all kinds of crap. Tiger bloom should have more than enough micro nutrients. Yet your adding calmag?

So slow those plants down. Flush again if need be and go slow. You flushed and fed twice in 6 days? That might be an issue as well. Flush the soil with phed water, 2 x times the container size, let get dry than feed 1/4th or 1/2th strength tiger bloom, with big bloom use tablespoons not ounces. 1 or 2 tablespoons per gallon. Leave the others out just keep it simple. Do not feed more than once a week. Make sure you ph after you add nutes. Just take it slow till you get the handle on the issue. You went right back to the same nute level and everything. Ofcourse nothing changed.

Good Luck

Leftyy2k4 said:

You need to slow it down a lil. You are having a strain specific issue. Now some of the lower yellowing might be from flowering but the top is another issue.

Why the calmag and sweet? Stick the the big bloom and tiger bloom and go slow. You might be adding to much and causing all kinds of crap. Tiger bloom should have more than enough micro nutrients. Yet your adding calmag?

So slow those plants down. Flush again if need be and go slow. You flushed and fed twice in 6 days? That might be an issue as well. Flush the soil with phed water, 2 x times the container size, let get dry than feed 1/4th or 1/2th strength tiger bloom, with big bloom use tablespoons not ounces. 1 or 2 tablespoons per gallon. Leave the others out just keep it simple. Do not feed more than once a week. Make sure you ph after you add nutes. Just take it slow till you get the handle on the issue. You went right back to the same nute level and everything. Ofcourse nothing changed.

Good Luck

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Well if I only need to feed once per week, it sounds like I just found my problem. Ive been feeding based on fox farms every watering strength. It wasn't as big an issue in the past and I guess the super lemon haze is just better at taking the heavier dose than snow white.

As for what i did last week until now I technically flushed twice over two days since first flushing wasn't 2x container size. Then added 1/2 nutes 24 hours later and then full nutes on next watering 48 hours later. My last grow I didn't use calmag and had the same issue with snow white although much later in flowering with only 2 weeks left. So I just let it ride. The calmag was a recommendation from someone offline after having described the situation from that grow. Gonna flush again today and start over with 1/2 nutrients in 48 hours and see how it reacts over the next week if its not too late.

Dragline said:

Well if I only need to feed once per week, it sounds like I just found my problem. Ive been feeding based on fox farms every watering strength. It wasn't as big an issue in the past and I guess the super lemon haze is just better at taking the heavier dose than snow white.

As for what i did last week until now I technically flushed twice over two days since first flushing wasn't 2x container size. Then added 1/2 nutes 24 hours later and then full nutes on next watering 48 hours later. My last grow I didn't use calmag and had the same issue with snow white although much later in flowering with only 2 weeks left. So I just let it ride. The calmag was a recommendation from someone offline after having described the situation from that grow. Gonna flush again today and start over with 1/2 nutrients in 48 hours and see how it reacts over the next week if its not too late.

Click to expand...

Get rid fo the calmag. Tigerbloom/bigbloom is enough man. And if you additives I would look into there additives.

Next flush but than wait till they are dry to feed. Do not water again so soon. Your just adding stress and doing more harm. Sometimes plants can take 4 or more days to need watering again especially late in flower. Just get a cheap moisture meter. people bash them but i swear by mine with no watering issues. And Now i can tell right away of they are dry or not by feeling. So get a meter to guide you till you figure out a good schedule for watering.

I would apply these lessons to you other plants as well. Your really overdoing it imho on nutes and watering. Now in mid flower the plants will start to yellow like trees in the fall. That is normal and to ckmbat that you might try to add more veg nutes durring veg but once in flower you create more problems. Do as I suggest and feed once a week, water when dry, cut out the addittives other than fox farms stuff and let them run their course.

Good Luck