Nitrogen overdose in flwr

[blahman]

I'm getting what seems to be a nitrogen overdose in a number of my plants. They seem to be still growing good for the most part. Although I'm assuming this has slowed them down a bit. I've just flushed them and I'm waiting to resume feeding at a lower ppm.

I just want to figure out what happened exactly to cause this so it doesn't happen again. I've been feeding daily at a average of 850 ppm. I did feed a couple times at a max of 900-970ppm. I've used drip clean with each watering and made sure I had a good amount of runoff. I'm feeding with the following:

Sensi A & B
sensi cal
rhino skin
hg drip clean
big bud
bud candy

I'm using just canna coco with no added perilite in 5 gallon pots. I posted another thread a while back about light stress in this same grow. I was feeding when ever the coco dried to half its saturated weight. I switched to feeding every day and it fixed their ability to process the light properly. But it seems as though my feeding every day has accumulated a nasty nutrient buildup.

So what should I be doing to stop this? I was hoping that drip clean would prevent this from happening. Should I be feeding 2:1 so feed twice then water with plain water once? and do a good flush once a month?

Any help is greatly appreciated i'm a newb when it comes to coco

The attached pic is the absolute worst plant that has been affected.

 

[inreplyavalon]

what day flower are you on? Do you feed to runoff, if so how much?

 

[Snow Crash]

The temperature of your solution could be doing this too.

I recommend keeping your solution temperatures under 68 degrees and ideally under 65 degrees. In my own garden if the reservoir temperatures reach 70 and up (basically room temperature from sitting in there for so long) that I begin to see this issue with "normal" nitrogen levels.

I'm not sure if the temperature makes it easier for nitrogen to be taken in, or if it is a sign of some kind of root issue, but it definitely seems to me that the solution temperature plays a role in this problem.

Hopefully that will give you a different direction to attack this from.

 

[praisehim.]

dont flush coco. ever.

Adding Drip Clean will release excess trapped nutrients in the medium and possibly burn the plant. hng suggests introducing Drip Clean slowly to avoid nutrient burn if adding later in cycle.

cut oout the drip clean, drop your nutes for the next four to six feeds, and then slowly bump them back up.

The trapped nutes is from when you werent watering enough times a week.

hope that helps.

 

[blahman]

what day flower are you on? Do you feed to runoff, if so how much?

Day 24 and yes I do feed to runoff I'm not sure exactly how much runoff but enough that there's a good amount running out from each pot.

 

[blahman]

dont flush coco. ever.

Adding Drip Clean will release excess trapped nutrients in the medium and possibly burn the plant. hng suggests introducing Drip Clean slowly to avoid nutrient burn if adding later in cycle.

cut oout the drip clean, drop your nutes for the next four to six feeds, and then slowly bump them back up.

The trapped nutes is from when you werent watering enough times a week.

hope that helps.

Why should one never flush in coco?

I've been using drip clean a week before switching to flower. So 31 days ago and 31 feedings with it.

I think the nitrogen overdose may be from using sensi cal/mg along with sensi A & B. The sensi cal has added nitrogen. The sensi cal label says you don't need it with the sensi line. But I figured since i'm using RO water it wouldn't hurt.

 

[BettaBudda]

Im starting to see a similar problem (N buildup in some of the fan leaves), I believe its because of the extra N in the calmag (Im not using Coco specific nutes).

Currently Im feeding 3/5/3 ml per gallon - Pro-tekt, Calmag, Dyna Grow grow.

Next res change Im thinking about either trying to use the bloom formula with the calmag (drop N to 5% total instead of the current 9%) or drop my mix down to 2/4/2 and see how it does.
I have found that under 4ml per gallon of calmag and I start seeing deficiencies.

 

[stickey fingers]

dont flush coco. ever.

Adding Drip Clean will release excess trapped nutrients in the medium and possibly burn the plant. hng suggests introducing Drip Clean slowly to avoid nutrient burn if adding later in cycle.

cut oout the drip clean, drop your nutes for the next four to six feeds, and then slowly bump them back up.

The trapped nutes is from when you werent watering enough times a week.

hope that helps.

what he said
why use drip clean ?

 

[blahman]

Im starting to see a similar problem (N buildup in some of the fan leaves), I believe its because of the extra N in the calmag (Im not using Coco specific nutes).

Currently Im feeding 3/5/3 ml per gallon - Pro-tekt, Calmag, Dyna Grow grow.

Next res change Im thinking about either trying to use the bloom formula with the calmag (drop N to 5% total instead of the current 9%) or drop my mix down to 2/4/2 and see how it does.
I have found that under 4ml per gallon of calmag and I start seeing deficiencies.

I've stopped adding the sensi cal mag, I'll keep my eyes open for any signs of a deficiency. But that's where I'm putting the blame for my current issues. Drip Clean could be making the situation worse as well.

 

[praisehim.]

^ you shouldnt drop the calmag. whatever is your base is (containing the highest level of nitrogen) is what you should adjust, and also get rid of the dripclean for now.

you shouldnt be flushin in coco because you should be doing it with every feed. considering you have enough run off.
coco also stores water and nutrient in its structure, making a natural ph buffer of its own. If you mess up the ph, then yes, flush with calmag, if not.. dont touch it.

 

[ShroomDr]

Read and comprehend your labels.
95% of Cal Mags are Calcium NITRATE. That is your most likely source of excess N.


'PPM' measurements are USELESS. Post your EC or dont bother.


Flushing coco is too big a subject to address with one post but... Generally, dont do it, you could fuck up the cation exchange, AND if the grow went properly its not really necessary.

HOWEVER, i do 'flush' (read drop my coco's EC) at the end of flower. Not only because of the floral senescence, but in preparation of reusing the coco. (my last 'flush' is 1/5 strength fertigation [using nothing that is heavy nitrate] and full strength 'enzymes').

 

[blahman]

^ you shouldnt drop the calmag. whatever is your base is (containing the highest level of nitrogen) is what you should adjust, and also get rid of the dripclean for now.

you shouldnt be flushin in coco because you should be doing it with every feed. considering you have enough run off.
coco also stores water and nutrient in its structure, making a natural ph buffer of its own. If you mess up the ph, then yes, flush with calmag, if not.. dont touch it.

I water to runoff every time. I'm just not sure how much runoff it would be, usually until I see it running out.

I'll continue to use the sensi calmag but i'll cut it down a bit. I think i'm feeding in total around 0.9 ec at the moment. Should I drop it down a bit more?

 

[stihgnobevoli]

yeah looks like nitrogen overdose. just cut back the nitrogen to half what you're currently giving and you will be fine. the leaves will never unclaw so don't look for them to, just watch to make sure no more claw up, and if they do, drop the nitrogen some more. from what i understand you shouldn't be feeding nitrogen past week 5-6 of flower anyway. just watch the plants they will tell you what they need.

 

[praisehim.]

blah- yeah bro, cut it down till you see things start looking good. then depending on what week of flowering you are in, you can make adjustments.

coco can be hard to learn if you've been growing in soil a long time. I took huge losses until i could get good nugs. But once you got ur sytem down, its soooo easy.

feel free to pm me if you got more questions. itll make things quicker for ya

 

[MIway]

I water to runoff every time. I'm just not sure how much runoff it would be, usually until I see it running out.

I'll continue to use the sensi calmag but i'll cut it down a bit. I think i'm feeding in total around 0.9 ec at the moment. Should I drop it down a bit more?

you can flush it all out in coir mid-run w/o any problems bro... and you seem to have caught it early, so that's the 'best' route. just use a .35~.5ec solution & run a shit ton through the tops until your run-off fall's back into line to where you want. you might want to actually check your run-off to start as good measure... to get a better idea of how bad the build-up is. anyway, give it a good go w the flush & then run u'r gals w a light .5ec flush every week or two. it'l keep your coir in balance while reducing the build-ups. personally, i'd just ditch the sensical, or just toss in 1-2ml per gal tops.