WTF, 400W 5 plant Vertical w/screen in coco.

I am using Blumats running around 550 to 600 ppm, Canna Coco, GH Micro, Bloom, Epsom, Cannazym, SM90, and Drip Clean with a pH of 5.8 to 6.0.

Only one out of 5 displaying this problem, started just a few days ago. This is one of three Blue Cheese, the others are showing no problems. The other two plants are Critical Kush.

I just completed a 2 gallon flush and then back to the tent and hooked up to the Blumats system, 536 ppm and 5.88 pH.

Keeping close eye on them.
Any suggestions would be great. Thanks

GR

you're spraying sm90? never turn the light on when the leaves are still wet.

more details are welcome. where is your light? 400w of what? do you have a mover to utilize that 400w over those 8 feet of canopy?

Low light can lead to problems that look like nutrient issues. 400W for such a big canopy is very small.

For HPS, you want a bare minimum of 30W/sq ft, preferably closer to 50W/sq ft.

If each panel is 3x4=12 sq ft x 5 panels, that's 60 sq ft. 30Wx60= 1800W!

ttystikk said:

Low light can lead to problems that look like nutrient issues. 400W for such a big canopy is very small.

For HPS, you want a bare minimum of 30W/sq ft, preferably closer to 50W/sq ft.

If each panel is 3x4=12 sq ft x 5 panels, that's 60 sq ft. 30Wx60= 1800W!

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Each panel is 1.5x3.3 = 4.95 or 5 sqft x 5 panels = 25 x 30W = 750W, so yes that would leave me short on W's. Not much I can do about this now, will look into a 600W for the winter/spring grow.
I know this is a bit short on W's but it is what it is for now. I have seen some impressive grows with 400W, again not what it could be with more light, but I do have to be careful with power consumption but maybe I will grow some bigger balls for my next grow.
Do you take in to consideration that it is a vert grow, I just lowered the light to where the top of the fixture is even with the top of the plants. The light is 12" from the plants. Being my first vert grow I am just going by what I have read as to where to locate the light after stretch. The heat factor is not bad at all, did the back of the hand test and it was fine.
When the lights come back on tonight I will check it with my light meter.
Anyway, I have not seen any improvement with the one BC that is giving me fits. Did a two gallon pH'ed and half rate nutes flush yesterday, did not check the runoff but got plenty of flow going through the grow medium, believe it was washed well. Then I started back on the rez nutes. This morning I had a good slow drip from the Blumats. I plan on checking them this evening and adjusting flow, want to increase it just a bit to all plants.
Sorry this is taken with the HPS on so hope you see what I am talking about.
This show the light positioning, will check it with the light meter this evening.

This shows where the light is in relation to the tops of the plants.

GR

I did check the pH 5.88 and the ppm 537 this morning. Not bad, I don't think anyway.

Everything looks good from what I can see. Thanks for the math, I was guessing at the size of your screens. You're not too far off and should do fine with the 400W, yes 600W will be better but this is good to get your feet wet.

gr865 said:

I am using Blumats running around 550 to 600 ppm, Canna Coco, GH Micro, Bloom, Epsom, Cannazym, SM90, and Drip Clean with a pH of 5.8 to 6.0.
View attachment 3765490
Only one out of 5 displaying this problem, started just a few days ago. This is one of three Blue Cheese, the others are showing no problems. The other two plants are Critical Kush.
View attachment 3765489
I just completed a 2 gallon flush and then back to the tent and hooked up to the Blumats system, 536 ppm and 5.88 pH.

Keeping close eye on them.
Any suggestions would be great. Thanks

GR

Click to expand...

i'm not liking all that clawing man, may wanna back off the feed..
plus they look odd..
last time I saw damage like that it was from russet mites...
be VERY sure you don't have any bugs man..
here is what some pics of that look like
sometimes they claw, sometimes they just yellow
the ones I had made them claw

here are some others that resemble yours a lil

greasemonkeymann said:

i'm not liking all that clawing man, may wanna back off the feed..
plus they look odd..
last time I saw damage like that it was from russet mites...
be VERY sure you don't have any bugs man..
here is what some pics of that look like
sometimes they claw, sometimes they just yellow
the ones I had made them claw
View attachment 3766282

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Hey bud thanks for the info, I am not seeing it on any of the other two Blue Cheese strains or the two Critical Kush. I did a rez change, cleaned the two rez's, added all new nutes, 11 gallons, 535 ppm and 5.89 pH.
I have done everything I can think of, the nutes have never been over 650 and that was just once, most mixes are 550 to 600 ppm, 5.8 to 6.0 pH. Using GH micro/bloom, cannazym, SM90 and Drip clean.
Just going to have to watch them.
GR

gr865 said:

Hey bud thanks for the info, I am not seeing it on any of the other two Blue Cheese strains or the two Critical Kush. I did a rez change, cleaned the two rez's, added all new nutes, 11 gallons, 535 ppm and 5.89 pH.
I have done everything I can think of, the nutes have never been over 650 and that was just once, most mixes are 550 to 600 ppm, 5.8 to 6.0 pH. Using GH micro/bloom, cannazym, SM90 and Drip clean.
Just going to have to watch them.
GR

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just remember russets and spider mites act TOTALLY different, a russet infection won't spread that fast..
are the two that are infected next to each other?
or touching?
a spider mite infestation goes FAST, like BOOM and you are webbed (expecially in the summer)
but a russet infestation goes slooow..
they are so small the only warning is a light colored new growth, and clawing.

yeah that clawing looks bad

maybe genetic ? under feeding ? over feeding ? heat stress ? sometimes I notice "wind stress" can cause that too, sometimes you have a choice burn them with a fan or burn them with a light, pretty hot summer this year even in the UK

Had 35c outside in the shaded part of our garden the other day in London, funny how my bloom area was like 28 to 30c maybe 32c in a hot spot that day, with no aircon, gotta love a 200 to 250mm box fan

how much is the temperature in the room? (sorry if i missed it from the previous posts)

looks like heat stress, maybe nutrient stress (overfeeding), but shouldnt be the case with those ppms.

DrGhard said:

how much is the temperature in the room? (sorry if i missed it from the previous posts)

looks like heat stress, maybe nutrient stress (overfeeding), but shouldnt be the case with those ppms.

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79 to 81 F (26 to 27 C) with the lights on and 67 to 71 F (19.5 to 21.5 C) with lights off.
As far as feeding goes they are feed through Blumats from a 10 gallon primary rez and a 7 gallon secondary rez, neither is ever full, 10 gal has about 6 gal in it and the 7 gal has about 5 gallons. I leave room so I can add jugs of ice to the rez's. temps run from 67 F to 77 to 80 F max.
The secondary rez has a pump that pump material to the primary that is about 42 inches off the ground. In the secondary I have the pump, and a 1 foot long air stone that run 24/7. I like the set up, custom made PVC stand, allows for the secondary to be placed directly below the primary and so it pumps straight up to keep full and the drain is straight into the lower rez.

gr865 said:

79 to 81 F (26 to 27 C) with the lights on and 67 to 71 F (19.5 to 21.5 C) with lights off.
As far as feeding goes they are feed through Blumats from a 10 gallon primary rez and a 7 gallon secondary rez, neither is ever full, 10 gal has about 6 gal in it and the 7 gal has about 5 gallons. I leave room so I can add jugs of ice to the rez's. temps run from 67 F to 77 to 80 F max.
The secondary rez has a pump that pump material to the primary that is about 42 inches off the ground. In the secondary I have the pump, and a 1 foot long air stone that run 24/7. I like the set up, custom made PVC stand, allows for the secondary to be placed directly below the primary and so it pumps straight up to keep full and the drain is straight into the lower rez.

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that's really strange. there is no way that 26 C make the plant heat stressed, they can grow in full sunlight at 35C

maybe is just that plant genetic

cat of curiosity said:

you're spraying sm90? never turn the light on when the leaves are still wet.

more details are welcome. where is your light? 400w of what? do you have a mover to utilize that 400w over those 8 feet of canopy?

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Sorry I did not see your post earlier. no it is sprayed, run thru the rez and fed thru Blumats.
I am using a 400W HPS, no light mover. I am running vertical, two gallon smart pots with 3.3' x 1.5' screens. So total surface is approx. 5 sqft each so the 5 screens total 25 sqft, vertical and the bulb is 12" from the plants. Now that is from the screen so the plants are growing into the light, at no time are the plants too close to the light, this one is actually the furthest from the light as the others are still aggressively growing toward the light.

GR

gr865 said:

Sorry I did not see your post earlier. no it is sprayed, run thru the rez and fed thru Blumats.
I am using a 400W HPS, no light mover. I am running vertical, two gallon smart pots with 3.3' x 1.5' screens. So total surface is approx. 5 sqft each so the 5 screens total 25 sqft, vertical and the bulb is 12" from the plants. Now that is from the screen so the plants are growing into the light, at no time are the plants too close to the light, this one is actually the furthest from the light as the others are still aggressively growing toward the light.

GR

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check for any type of pest in the medium. sounds like you might have fungus gnats eating at your roots (which would look just like that picture).

wish you the best, and good luck!