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What causes cupping like this?

Photo period fems of Pennywise
I’m bottom watering for now till they get bigger.
Soil grow in a mixture of 1/3 FFOF 1/3 coast of main and 1/3 perlite
I water when they get droopy like in the picture
image.jpg
Still in veg for a while longer
Water has full feeding of MaxiGrow mixed in (2 tsp per gallon)
 
Light is on its lowest setting, dosent mean it’s not to harsh just don’t know what I could do about that this has actually only started since I introduced the inline exhaust and tried to tighten up my environmental parameters
 
Moshmen said:
Fans ? Did ya find any pest? What light ya runnin
Click to expand...
I am running a single fan currently low oscillating over them
This is my light
Moshmen said:
Why do you bottom feed ? I’m asking just cuz I don’t understand the value ? I like my roots in the bottom to be oxygen accessible ? But I may be all wet. Lol sorry I’m ripped - seriously though what are the advantages ?
Click to expand...
I bottom feed just cause if I let them sit for 10 min in there I know there are no dry spots or tailing through the medium. I’m mildly retarded so this could be dumb.
They’re manageable right now to do it but when they go into their final bags and are bigger obviously I’ll top water….. and don’t some big operations run flood tables for easier more consistent watering??? That’s actually a question I thought I read that but again I have no idea
 
If you have russet mites, a loupe might not be powerful enough to see them, they are very small. You can try pulling one of those upper fans that is affected and look at the petiole near where it attaches to the stem with your loupe. Also, look at the underside of the fans near the center where the leaflets come together and the underside of the leaves in general.

I'm not an expert on this topic but this is what I recall from another member who got these dirty buggars. Hope that it's not what your problem is!
 
Look at the underside of the leaf, all the way to the stem and yes they are very small and nasty

You say light is on its lowest setting ? What size is your tent and how high above are they ? They look plenty high but pictures u know ?
 
Problem is this is a reaction that could be due to one or more issues underwatering was mentioned but overwater can produce similar results , underwatering I would expect a more droopy looking plant
 
Kopper1013 said:
I am running a single fan currently low oscillating over them
This is my light

I bottom feed just cause if I let them sit for 10 min in there I know there are no dry spots or tailing through the medium. I’m mildly retarded so this could be dumb.
They’re manageable right now to do it but when they go into their final bags and are bigger obviously I’ll top water….. and don’t some big operations run flood tables for easier more consistent watering??? That’s actually a question I thought I read that but again I have no idea
Click to expand...
Personally I don’t like the bottom feed as my opinion I get better or more even watering from the top , flooding or watering to say 15% runoff or even more the drain it away just My experience doesn’t mean it’s right or wrong
 
Moshmen said:
Look at the underside of the leaf, all the way to the stem and yes they are very small and nasty

You say light is on its lowest setting ? What size is your tent and how high above are they ? They look plenty high but pictures u know ?
Click to expand...
Tent is a 5 x 5 and the light is high probably close to 4’ above the girls

I have a 60x loop and I’ll see what I can see, boy will I be bummed if it’s mites, everything is brand new in there so they’d have to be in the dirt I bought 🤬💔🤞🤞
 
I hate to agree with everyone else but if it is not light and the leaves are not burning up then it does look like RM.(n)
I have never had them but a couple of the guys who responded have.
My understanding is they are very difficult to see even with good magnification and even harder to treat.
 
Kopper1013 said:
Photo period fems of Pennywise
I’m bottom watering for now till they get bigger.
Soil grow in a mixture of 1/3 FFOF 1/3 coast of main and 1/3 perlite
I water when they get droopy like in the picture
View attachment 35187
Still in veg for a while longer
Water has full feeding of MaxiGrow mixed in (2 tsp per gallon)
Click to expand...
Clones or from seed?
 
MysticEpipedon said:
I think I would turn off that oscillating fan before I treated for mites.
Click to expand...
Treatment for young plants with hemp russet mites is basically cutting them at the base of the stem and putting them into a bonfire imho. Unless you are ok treating with something through flower.
Not even commercial miticides wipe them out, you can only control populations. As soon as you stop the control measures, they go berserk again.

Makes sense to get the fan off them and correct what they can. But given those signs I would be scoping hard to rule out russets before I invested a whole lot more time and nutrients on them.
 
These are the girls as of yesterday morning
Look better but obviously still cupping.
Haven’t been able to see any mites yet but my loop may not be strong enough either…don’t wanna up pot till I know if I have to just toss them but they’re getting big….
Any other way to tell?
E0595B39-5066-45B5-A6C3-F56934670882.jpeg50E55A95-D11F-4259-875A-28709E1F39C8.jpeg6517CA4C-9DE1-43AE-BBC2-989F950CAE66.jpeg
 
Update y’all:

So it’s decision time! Kill’em or go for it and up pot them.
The girls are getting rather large and I like to get them bagged and under SCROG if they’re worth continuing.
They’re showing some burns on the lower leaves but I think that’s nutrients as I’ve been feeding every watering instead of every other😬😬
I lowered temps a couple degrees and humidity some just to see how the would react, they seem to be happy but there’s still the chipping I’m worried about…. I’m going to post this in my other thread to get as many options as possible before I make a bad call one way or another…. Thanks y’all
9DADE5FF-9C3B-414C-8C63-C458692ADB92.jpeg

216E4FD4-270E-48C3-B8CD-AB041218B177.jpeg

AA00972D-8C89-43AC-9686-6A7F8A97739F.jpeg

4DB74F3E-3DF9-44C0-BEAB-64EE1489557F.jpeg

46A8FDB9-9A43-40AD-B783-24833C724432.jpeg
 
@Kopper1013 have you actually seen a mite yet? Call me mildly retard as well but otherwise I don’t see a problem with those plants that can’t be fixed.
 
I check them every day with a 60x loop, I’ve pulled stems, leaves, bent stuff over looked every but no I haven’t seen a mite yet but also haven’t cured the issue so…..🤷🏼‍♂️🤷🏼‍♂️
 
Kopper1013 said:
I check them every day with a 60x loop, I’ve pulled stems, leaves, bent stuff over looked every but no I haven’t seen a mite yet but also haven’t cured the issue so…..🤷🏼‍♂️🤷🏼‍♂️
Click to expand...
I’m by no means an expert on mites but I did have a grow that had them a year or so ago. I’m not sure what level of magnification you need to see them but I bought a digital microscope on Amazon for about $40 that would Bluetooth to my phone. The little bastards are impossible to see with the naked eye but once under scope it was obvious. Here is a photo of what the plant looked like, it was about 3-4 weeks into flower, and a video of the mites under the microscopeIMG_2465.jpeg
View attachment 2023-03-01-19-58-41.mp4
 
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