You may need to add a touch of boron if you have been using a lot of gypsum.
Boron helps with calcium absorption.
This is just a guess, it is hard to diagnose a problem without being there in person.
Boric acid spray @ 1-2 ppm is worth a try.
Probably not a coincidence.
This may also be too much calcium and that could be locking out other elements.
If you add the boron it may help by absorbing the excess calcium.
This could work to help the lockout resolve itself.
In any event, maybe cut back on the gypsum for a bit and see if things get back to normal.
I would not worry too much about things right now, if they start to get worse then it may be time to take action.
@shag raises a good possibility and probably understands all that stuff beyond what I do but I do have some thoughts.
What is the NPK ratio right now? and ppms nutrient , ppm gypsum?
excess nitrogen can antagonize calcium and potassium leading to lockout
excess phosphorous will lock out zinc, iron, copper
excess potassium will affect calcium and magnesium uptake
In the transition from veg to flower some plants begin to have specific needs or so it seems but I always recheck my nutrient and additive #s , PH values and a run off test.
Your PH range might be a tad high on the run off and this might be where the issue lies. On the PH range chart you can see how the PH range affects the uptake of certain nutrients and elements. Playing with those PH numbers on your inputs can limit or maximize the uptake of certain elements of the nutrient mix. It might just be that the higher ph is affecting how the plant is feeding and the range may be preventing a balanced uptake for the plantās lifestage.
I dunno if that makes sense but it does to me LOL
Ideally I would probably want to be seeing 6.6 to 6.8 ph going in , 6.2 on the run off using fresh water. Have a look at the PH range vs nutrients/elements chart and see if I am making sense hehehe
Lots here. Thanks for jumping in @SHSC-1 . Youāll be seeing yours here soon enough. Need to sort this shit out. You too @shag . You know where I started, jumped in and helped me learn enough to not loose my shit. Both of you. I learned enough to know I didnāt feel like messing with MaxiBloom or Maxigrow in my tents. Probably a decent product once you get past the learning curve. Maybe the yard to use it up. I have testers started that are OK, but OK isnāt good enough. Right @JAWS ? They look decent, no bad deficiencies right now. They got nutes switched too.
Ive checked gypsum ppm recently. 400-600 is the range.
So NPK. I just switched from MaxiBloom back to the Lucas formula I liked in the past. I have everything on hand now to reproduce results like past runs. I ordered a couple things since the local store closed. Hope I donāt need them much, but wishing I had some mag nit or mag powder would be bad. So I got fresh bags.
I havenāt seen those leaves on the other 3 DOWs. Itās not on new growth either.
me too, I only add it with the nutrients.
I base my numbers off the alterations I made after discussing gypsum with our long lost brother coastal from the labs. He really helped me refine things using lucas and gh flora and the addition of gypsum to the equation. Got me off the cal/mag as flora micro has a good amount of mag in it and steered things more towards targetting the calcium and sulphur. I donāt use diamond K , I use Agricultural Grade but the ppm target numbers should be similar if not the same on the meter.
That said if you were doing what you were doing before this and getting the results that please youā¦ Iām not suggesting you change things up hehehe.
just trying to help. Havenāt been very present in my friendās threads this fall but Iām trying to change that hehehe
that is a relief. I always pucker up a little when the wife tells me she used her card instead of cash to send it. Here i am with gloves on for the whole process and a fake return addy and what does she do??? Doh!!
So Iām glad it made it safely LOL
A younger buddy in Mendoās dad was old school like that. His dadās just a few years older. Back in the 3 strikes era. Iād seen him walk in to a room and see a guy working with no gloves. "Start over.ā
Iām just sitting down to look. Right now Iām speechless! Comments when I process what just showed up!
Sooo I am looking over this post again, why cause I canāt sleep and it is 5am and I need to be quietā¦
Looking at the pic I posted I noticed it says scan.
I was just using the pic cause it is kinda cool.
But
It would seem you can take a pic and then use AI to identify the problem and get a solution.
GrowDoc was created to identify the cause of sick cannabis plants. Whether your plant is wilting or showing symptoms on the leaves, GrowDoc will be there to determine the cause and tell you what needs to be done to fix it.
Boy I guess I need to get up early more oftenā¦WTF??
Seems it works on PC too.
So I ran your picā¦
This is the result it gave.
Seems our boy @SHSC-1 was right on.
Ph Fluctuation
Description:
The optimal pH ranges are 5.6-6.2 (hydro) and 6.1-6.9 (soil). In the optimal pH range, your plant is able to access the most nutrients. When outside that range, your plant is unable to uptake certain macro & micro nutrients. Typical visual symptoms are distinct interveinal burn marks that cover parts of the leaf. An unbalanced pH can also show symptoms presenting deficiencies or toxicities. pH fluctuations in the root zone will cause your plant growth to be stunted and become weaker.
It gave some alternatives, so I think this is an AI educated guess.
That is all I really do myself, so I do not find fault with it yet.
I do not think this is a magic fix but it could be useful.
Calcium Deficiency
Description:
Calcium is very important to cannabis plant growth. It factors into early root development, nutrient uptake, developing cell walls and membranes, plant transpiration, and strong flowering. An immobile nutrient, the plant will first show symptoms on new growth such as yellowing and deformed leaves. Yellow & Brown spots will begin on the Fan leaves, in severe cases, necrosis will increase & leaves will die out. When calcium is low, the plant becomes susceptible to powdery mildew and pests.
@crownpoodle
I hear you making coffee in the kitchen, seems you canāt sleep either.
If I recall this is how you and I became friendsā¦
I am smokinā headband right now.
It was stashed away and I recently found it.
A nice tasty treat.
What do you have burning?
If you are up, you probably need a good medical strain/cultivar.
BTW
I still feel it could be an excess calcium issue, @SHSC-1 said the same.
2 old school growers trump the AIā¦
Do you add the parts separately, one after another?
When I first started using jacks, Iād weigh out both A and B together, and dump them in at the same time. There would always be salts precipitating out. Now with warm water, and letting A dissolve before I add B, it works much better.
OK. New gypsum ppm rate is 200 to 300, targeting 250ppm. Saw your cal-mag comment. Iāve been using GH CaliMagic @ 5ml gallon, but will drop to 2.5 for now. Iād love to put another bottle aside.
