Is this a copper deficiency, and should it be flushed?

[Daveindiego]

WTF is this?

Indoor 600w
Coco
RO water
Minimal nutrient system (1 Base, 1 Flower enhancer, CalMag)
Blumat autowatering with 12 gallon reservoir changed weekly.

Looking at growweedeasy.com, looks like a copper deficiency?

 

[Roger A. Shrubber]

i'm not sure, if it is copper, it's just starting, and the yellowing along the edges and leaf tips hasn't happened yet. it's usually a ph problem that causes copper deficiency. you might want to check your meter and make sure it's calibrated right.
you do have a little N tox going on, but that makes leaves darker green, not blue, not sure whats causing that coloration.
it's possible the N tox is causing a lockout. i'd do a very light "flush", maybe two gallons, then light feed, with lower N.

 

[Daveindiego]

i'm not sure, if it is copper, it's just starting, and the yellowing along the edges and leaf tips hasn't happened yet. it's usually a ph problem that causes copper deficiency. you might want to check your meter and make sure it's calibrated right.
you do have a little N tox going on, but that makes leaves darker green, not blue, not sure whats causing that coloration.
it's possible the N tox is causing a lockout. i'd do a very light "flush", maybe two gallons, then light feed, with lower N.

Thanks.

This plant is in week 5 of flower.

I just gave it 8 gallons, and got a 6.0ph and 400ppms runoff. I’ll keep an eye on it for a few days, and determine how to handle the others.

The flower looks like it’s coming in well, so I’m hesitant to fuck it up worse.

 

[Daveindiego]

This is why I hate coco.

Right side is what went in, left side is what came out after first pour.

I’m flushing everything with 8 gallons

.

 

[Daveindiego]

After 8 gallons.

 

[Daveindiego]

Currently flushing the 4th plant. Been checking ph and PPMs after first runoff.

WTF.



This has historically been my problem with coco. This time around, using the Blumats, things have been going ‘better’.

I don’t think I’ll use coco after this.

Any idea or thoughts @Dr. Who @since1991 @Dynamo626 @xtsho

 

[Daveindiego]

Btw, had the ph pen calibrated last Saturday. 4 days ago.

 

[dongle69]

They look over-fed. They also look like they have been subjected to cool temperature.
Does your flower "enhancer" have triacontanol in it?
Never flush coco with anything less than .6 ec (something with calcium in it).

 

[Daveindiego]

They look over-fed. They also look like they have been subjected to cool temperature.
Does your flower "enhancer" have triacontanol in it?
Never flush coco with anything less than .6 ec (something with calcium in it).

Couple of the pots I took out seemed a little ‘light’ to me, like ready to be fed.

Temps have gotten down to 55, and I’ve been maintaining a recent high temp of 73-77.

I’ve been flushing them with the same nutrients as week 1 Veg. CalMag and Base.

This is the Flower enhancer. Been using 1ml per gallon.

 

[dongle69]

The night temps are causing the purple leaves (nice) but also limiting your plants.
I didn't mean they seem over watered, but over-fed (strength). Coco should not dry out once roots are established.
They have been fed too much (strong) or there is buildup / not enough run off.
The photo of your meter shows over 5000ppm.

 

[Dynamo626]

i'm not sure, if it is copper, it's just starting, and the yellowing along the edges and leaf tips hasn't happened yet. it's usually a ph problem that causes copper deficiency. you might want to check your meter and make sure it's calibrated right.
you do have a little N tox going on, but that makes leaves darker green, not blue, not sure whats causing that coloration.
it's possible the N tox is causing a lockout. i'd do a very light "flush", maybe two gallons, then light feed, with lower N.

what this guy said lol. nit tox and over fed. low night temps causing the purp. you arnt over feeding but the blue mats arnt watering to run off so salt is building up in the coco. if your running blu mats every few days give em an extra drink to good run off (have to get rid of it, cant let the pots sit in it) this will keep the salt build up to a minimum.

 

[Daveindiego]

The night temps are causing the purple leaves (nice) but also limiting your plants.
I didn't mean they seem over watered, but over-fed (strength). Coco should not dry out once roots are established.
They have been fed too much (strong) or there is buildup / not enough run off.
The photo of your meter shows over 5000ppm.

Thanks.

The highest level of PPMs fed these plants was a week at about 1100. The past two weeks has been at about 500. I’m not sure how much more I can dial back what I’m feeding. For example, that 12 gallons of RO water, I’m using 40 ml of Base, 20 ml of CalMag, and 12 ml of enhancer. If I mixed at recommendation, it would be about 150 ml Base, 60 ml of CalMag, and 45 ml of enhancer.

I just get these crazy build ups AND a huge drop in ph every time I use coco.

 

[Daveindiego]

what this guy said lol. nit tox and over fed. low night temps causing the purp. you arnt over feeding but the blue mats arnt watering to run off so salt is building up in the coco. if your running blu mats every few days give em an extra drink to good run off (have to get rid of it, cant let the pots sit in it) this will keep the salt build up to a minimum.

I haven’t been using any additional Nitrogen during this cycle at all.

I might have to try setting the Blumats for a feeding to runoff, but I don’t think I should have to do that, defeats the purpose of the Blumats.

Curious to hear from @xtsho

If I recall correctly, he said he ‘sets it and forgets it’, and he suggested that he never has to bother feeding to runoff.

 

[Daveindiego]

Check this one out.

It had a 5500 ppm runoff. Is there anything about this plant to suggest that bad of a buildup?

 

[Daveindiego]

Flushed them all to a less than 500ppm runoff.

Still having lower than desired ph levels.

 

[dongle69]

The ph drop was from too much food in the root zone.
Clawing, curled leaves with burnt tips is classic nutrient toxicity.
Roots can't function properly.
Blumats were designed for clean water with no nutrients, used to feed soil.
Once you start using them like that, you need to water from the top once a week or so (with runoff) to keep buildup from happening (like Dynamo mentioned above).
Also not sure what scale you are using for ppm (500, 700, or ?).

 

[Dynamo626]

Check this one out.

It had a 5500 ppm runoff. Is there anything about this plant to suggest that bad of a buildup?

View attachment 4116886 View attachment 4116888 View attachment 4116889

Omg yes! Super dark green glossy and clawed. Burnt all over. If your only feeding at 500ppm then there most definatly is a build up of salt

 

[Dynamo626]

Here are a couple recent pics see how even the big fan leaves are lifting towards the sky? They call that praying. Its caused by osmosic pressure ((turger pressure) in osmosis water wants to move from a place of low salinity to high salinity. As soon as my leaves start to drop and it isnt because the pot is dry i take it as a sign that salt is starting to build up and i may be due for a flush.

 

[Kingrow1]

Run coco wetter and get way more runoff, use a flush product, cut calmag completely and practise over many grows.

 

[Daveindiego]

Run coco wetter and get way more runoff, use a flush product, cut calmag completely and practise over many grows.

Cut CalMag completely while running RO water?!!!

I’m using Blumats, so I’m not getting runoff.