Calcium

[Groff]

I've done Coco grows with pure organic nutes not problem whatsoever. You need to treat your grow based on the nutrient profile, not the substrate used

 

[Sour D]

@GeorgeCloney I have grown Organic in soil in the past. I grow hydro now and use salts. I think it is too complicated to try to grow organic hydro.

You know, probably the best yield I've had so far was using Green Planet Medi One which is their "organic" line. I did have some issues towards the end which if I was able to figure it out wold have been even better.

 

[Proph]

Ya. I'm sure there is plenty of calcium. I cant get my head around too much potassium (guess its possible) I only added a tsp or less of banana peels a couple times in 3 weeks in a 5 gal. I think not PHing is my issue. Even if the microbes will buffer the PH for you in an ideal situation I think PHing has to be done. Too soon old too late smart. I gave more calcium a try for a week. On the PH now. Going 6.0 tonight. that will be 3 consecutive PHed waterings. 6.5, 6.3, 6.0. I'll go 5.8 tomorrow. then repeat the cycle. I feel like I failed. Was lazy not PHing. Was following advice if people I thought knew better than I. Hopefully a week of PH will tell the story. If it is not that I will be at a total loss.

Im not sure where the confusion came into play.. But if you are growing in coco, then PH'in is almost mandatory. You should also do some reading on using calcium and coco.. Specifically the CEC rates. It is very easy to lock out nutrients (especially cal/mag) in coco due to the CEC. This is obviously what has happened at this point. I say that because, if you are seeing a "deficiency" of a nutrient that you know you've been using/feeding with for a while, then that should hint you towards a lock out. "Adding more" of that nutrient is rarely the answer.

 

[Builder0101]

Never foliar at lights out, That will promote PM and other molds. You obviously have a problem and based on what I am reading you have got your nutrients way out of balance. Maybe too much of something. How are you testing the PH in the root zone? That chart is a soil chart and since this is Coco this is a hydro grow and doing hydro "Organic" is an uphill battle to start with.
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Do you fertigate to 20% run-off every day?

I would first test the root zone PH with a GOOD meter (Accurate 8 or BlueLab for Coco probe) and then add an immediately available Cal-Mag supplement. You may need to resort to a good flush and reset with balanced nutrients plus extra Cal-mag for the coco.

Thanks. I had 2 successful harvests both were run almost all the way through with PHed water between 6.0 and 6.8. I became convinced bu others that in organic with beneficial microbes that PHing was unnecessary. I stopped PHing. I think that is my issue. Si ce I run LED I think the chances of boiling the leaves by spraying lights on is pretty unlikely. I do not water to runoff perse. I water and place the fabric pots on folded towels. the towels weigh 3 or 4 pounds after so yes there is runoff. This plant has had only one topdress and I always go 50-75% of the recommended dose. I did add a teaspoonish of ground banana peels a couple times. If lockout from that then banana peels are really strong. I am PHing again and foliar spraying. Next few days will tell the story. I'll keep you posted. Thank you all.

 

[Builder0101]

Im not sure where the confusion came into play.. But if you are growing in coco, then PH'in is almost mandatory. You should also do some reading on using calcium and coco.. Specifically the CEC rates. It is very easy to lock out nutrients (especially cal/mag) in coco due to the CEC. This is obviously what has happened at this point. I say that because, if you are seeing a "deficiency" of a nutrient that you know you've been using/feeding with for a while, then that should hint you towards a lock out. "Adding more" of that nutrient is rarely the answer.

Yes I went into the grow by rinsing and buffering the coco...
Like I said I feel it is PH issue. I know there is calcium available. I'm pretty sure potassium is not the issue. Never feed heavy.

 

[Mañ'O'Green]

Yes I went into the grow by rinsing and buffering the coco...
Like I said I feel it is PH issue. I know there is calcium available. I'm pretty sure potassium is not the issue. Never feed heavy.

Until you know the PH in your root zone this is just guesswork and you have as much chance of doing something harmful as helpful!

 

[Builder0101]

All I can do is test runoff

 

[Proph]

Also, if you do not water until run off, then there is a good chance there is salt build up at the bottom of the pot. Coco should be watered to run off if for no other reason than to flush out some of the salt build up.

 

[Sour D]

 

[Builder0101]

Thanks. I always get water out.