Was wondering what deficiency would resemble calcium mid/late in flower? I've basically been fighting this problem with one of my strains for over a year now and can't pinpoint the problem...I know it's getting a decent dose of calcium through the use of cal/mag plus....use fox farm tiger bloom and grow big (I believe they have a low calcium/mag. in their product hence the use of the cal/mag plus)....I flush regularly... my ppm's aren't through the roof to cause a lockout...yet every time around the 35-40 day...BAM....it shows what looks like cacium def. from about mid plant and up....any ideas people???
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Calcium....
- Thread starter 420guy
- Start date
G
Guest
Photos? Curious as I may have a similiar problem only at 3-5wks.
How about the details of your environment, setup, and nute strengths?
I've run FF several times and didn't have calcium problems...I did have to add CM for mag tho with some strains...
I've run FF several times and didn't have calcium problems...I did have to add CM for mag tho with some strains...
Ya I agree more information is needed, but usally around that time nitrogen deficiency starts to show up. Are the leaves yellowing at the middle to lower parts of the plant? But before anyone can help you make a 100% diagnosis more information is needed like others have stated here.
Hey there sandman how things going
Hey there sandman how things going
sorry about the lack of info earlier fellas...here goes the breakdown:
strains are British Columbia Seed Companies Blue Dynamite and White Lightning
(4) 1000 watt hortilux
co2 injection
(4) 6 bucket 5 gallon dwc
fox farm grow big and tiger bloom
hydroguard and hydrozyme
cal/mag plus
ph: always 5.9-6.1
ppm levels: early veg=600-650
late veg=800-850
early flower= 1.00-1.1
late flower= 1.3-1.4
final two weeks flush with ph water only
I realize that pictures are an almost MUST with diagnosis guys, but I"m still a little hesitant after the O.G. went down...anyways, the problem occurs about mid plant and works it's way up...it looks EXACTLY like the pic Stitch has in the infirmary guide on late calcium def. (little brown spots and all)...no signs of nitrogen def.( yellowing lower half of plant)...it very well could be calcium def. , but I figured with the addition of cal/mag I wouldn't have this problem...pics WILL be up in a few days to further my cause...thanks for the replies fellas...
strains are British Columbia Seed Companies Blue Dynamite and White Lightning
(4) 1000 watt hortilux
co2 injection
(4) 6 bucket 5 gallon dwc
fox farm grow big and tiger bloom
hydroguard and hydrozyme
cal/mag plus
ph: always 5.9-6.1
ppm levels: early veg=600-650
late veg=800-850
early flower= 1.00-1.1
late flower= 1.3-1.4
final two weeks flush with ph water only
I realize that pictures are an almost MUST with diagnosis guys, but I"m still a little hesitant after the O.G. went down...anyways, the problem occurs about mid plant and works it's way up...it looks EXACTLY like the pic Stitch has in the infirmary guide on late calcium def. (little brown spots and all)...no signs of nitrogen def.( yellowing lower half of plant)...it very well could be calcium def. , but I figured with the addition of cal/mag I wouldn't have this problem...pics WILL be up in a few days to further my cause...thanks for the replies fellas...
powdergreen
Member
calcium potasium and magnesium all fight to be gobbled up by your plants so the ratio has to be close to 4-2-1 . K-Ca-mg. Some strains really like magnesium, just gotta figure it out. ALso when you show your ppm numbers and you show it in decimal is 1.0-1.1 mean 1000-1100 ppm??or is it ec?
Hotgurl......sorry, no insult intended, just my " default" reply, this is the first I've heard of about fox farm products not suitable for DWC, is this really true? 
powdergreen......yes 1.0-1.1 means 1000-1100 ppm sorry, that's how my pen reads....I do believe you are correct about certain strains being nute gobblers, my white lightning never has this problem, but my blue dynamite always does it
powdergreen......yes 1.0-1.1 means 1000-1100 ppm sorry, that's how my pen reads....I do believe you are correct about certain strains being nute gobblers, my white lightning never has this problem, but my blue dynamite always does it
I'm not real sure on my conversion factor...but my pen DOES read in ppm and not the pre-mentioned EC...it states per my directions that I am looking at that it measures from 0-999 ppm, the resolution is in increments of 1ppm. From 1000 to 9990 ppm, the resolution is in increments of 10ppm, indicated by a blinking 'x10' image...here's the exact pen I have
http://www.h2ofilter.net/tdsmeter3.asp
http://www.h2ofilter.net/tdsmeter3.asp
Looks like nute burn/lockout & Ph issues to me...
I agree with sandman, looks like ph issues that caused a imbalance of things.
You really never want to listen to the bacjk of the bottle cause all strains are different there is absolutely NO one set nutrient level for cannabis. period!
I would love to see a cannabis plant that has 8,000 PPM's that plant would have to have the hand of god to live through that let alone be around 20 feet tall!
It's always good to start out low and adjust, your ;plant can come back from to low of nutrients rather then to much where it has to recover more when it is burned.
How big are these plants what is the ph and ppm's right now?
You really never want to listen to the bacjk of the bottle cause all strains are different there is absolutely NO one set nutrient level for cannabis. period!
I would love to see a cannabis plant that has 8,000 PPM's that plant would have to have the hand of god to live through that let alone be around 20 feet tall!
It's always good to start out low and adjust, your ;plant can come back from to low of nutrients rather then to much where it has to recover more when it is burned.
How big are these plants what is the ph and ppm's right now?
Soil PH !!!!
Soil PH !!!!
Hi All ! Yes it is a PH problem........
Same thing happened to a previous crop and PH was way to low/high 5's....so
changed all water to PH 6.5 and solved the problem after a week to 10 days
try it to stay safe.......grow cubes PH-5.8.....soil grown PH-6.5 and this has
been a huge improvement good luck Peace!
Soil PH !!!!
Hi All ! Yes it is a PH problem........ Same thing happened to a previous crop and PH was way to low/high 5's....so
changed all water to PH 6.5 and solved the problem after a week to 10 days
try it to stay safe.......grow cubes PH-5.8.....soil grown PH-6.5 and this has
been a huge improvement good luck
Peace!
at this exact moment(or at least ten minutes ago)...ph is at 5.9 and my pen reads 954 ppm...they vary in size, but average about three and a half to four foot when finished stretching...I to thought ph issues causing a lockout,i would then change my water in the entire system and start with a low ppm...I've already flushed three times and these girls are only 37 days into 12/12 today....I'm missing something here...It's only in ONE of the two strains I have going now...I'm beginning to think my fox farm nutes are killing me...I'm EXTREMELY thankful of all replies especially those of Stitch and Sandman as you guys gave me tons of advice over at o.g. years back that have allowed me to get this far...stay safe
powdergreen
Member
what are the amounts of ferts and calmag plus. They do look a little dark green maybe a Nitrogen toxicity locking out something.
Hmmm...something I just noticed...you're using Grow Big instead of Big Bloom - I think you may be getting an N tox (clawed leaves, DARK green leaves and burnt tips) that's locking out calcium (necrotic spots).
Is the Grow Big the hydro or soil formulation?
Is the Grow Big the hydro or soil formulation?
the grow big IS the hydro formulation...if using fox farm nutes what would the formula be...I know that most people here use the flora stuff, I just have a REALLY good connection buying fox farm products so that's what i have used for the past five years...i was always under the understanding that grow big and tiger bloom would be enough...don't tell me that all I've needed to do was introduce the correct amount of big bloom!!!!
The GB is 3-2-6 and the TB is 2-8-4...the BB is .1-.3-.7
The exact mix will vary with your plant size, feeding schedule and strain specific requirements but generally speaking half strength FF nutes (BB & TB) with 4-5ml/gal of CalMag and an uptake enhancer like LK (at 75% strength) will be plenty.
Going with GB & TB you'll be giving them way too much N. Usually with 55-60 day strains, I like a slight N def to start showing up at about 35-40 days...at about 45-50 days I start an attrition flushing by just not topping off the nutes and letting the PPM drop as it's consumed by the plant.
So yes, I do believe the answer is really as simple as running BB instead of GB
Here's FF's Hydro Feeding schedule to give you some ballpark places to start. If you run em at the full rated strength it WILL burn most strains, so start at about 1/2-2/3 strength and work up from there.
http://foxfarmfertilizer.com/HydroSystems_FF_Feed.pdf (downloadable .PDF)
The exact mix will vary with your plant size, feeding schedule and strain specific requirements but generally speaking half strength FF nutes (BB & TB) with 4-5ml/gal of CalMag and an uptake enhancer like LK (at 75% strength) will be plenty.
Going with GB & TB you'll be giving them way too much N. Usually with 55-60 day strains, I like a slight N def to start showing up at about 35-40 days...at about 45-50 days I start an attrition flushing by just not topping off the nutes and letting the PPM drop as it's consumed by the plant.
So yes, I do believe the answer is really as simple as running BB instead of GB
Here's FF's Hydro Feeding schedule to give you some ballpark places to start. If you run em at the full rated strength it WILL burn most strains, so start at about 1/2-2/3 strength and work up from there.
http://foxfarmfertilizer.com/HydroSystems_FF_Feed.pdf (downloadable .PDF)
