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came across it on google somewhere if you search you will probably find it, think i was searching for calcium issues

just that it isnt accurate

those leaves are really very dark green looking so im wondering is there a toxicity of something which is about to cause a lockout? are you feeding heavy?

how are the bottom leaves looking?

have seen that chart debunked in other places, just fyi

week 8/9 from flower?? i think it still has a ways to go yet

yeah make sure the pot is of adequate size ime you are better off letting the plant tell you it needs to be fed rather than overdosing it with nutes/calmag as this can cause lockouts and is more difficult to troubleshoot, so you are right with 1/4 strength nutes then if the plant seems like it...

have you fed post flush? i would just feed it now and see what happens, maybe a small amount of cal-mag also

can you post a wide angle shot of whole plant, it looks over watered

not sure why the runoff ph is 5 if you are flushing with ph 6.5 water, maybe you need to flush it a bit more? yes does look like Ca/Mg toxicity, leaves are very green

avoid the temptation to water too much, get one of those moisture testers to check the soil down a few inches into the pot, they are cheap alternatively you should know by lifting the pot, it will be a lot lighter when the soil has dried out, let the roots search for water......

Check pH first to me, it looks like magnesium deficiency but hard to tell from that one photo

could be potassium deficiency, it can look like nute burn - you will know if the leaves get worse

because i always seem to magnesium deficiency i was feeding cal-mag supplement to the plants, even when they went past seedling stage - this excess calcium combined with the hard water then starting locking out magnesium so of course i upped the calmag dose mistakenly, thereby making things...

hello, I am currently growing in soil but have a problem with Calcium building up in the soil and locking out other stuff, it happens every grow. Pretty sure this is due to the fact that my water is on the hard side usually i get a mag deficiency, so i will add a mag supplement but this seems...

yes could be, I think excess Phosphorous can cause Calcium/Magnesium lock out

be careful adding more, sometimes that can just make things worse if those leaves are already affected then im not sure if they will recover, you need to check unaffected leaves and see if they are still staying ok. Also i run my ph at 6.7 - 7 - i think (and someone please correct me if im...

first pic kinda looks like calcium def, how is your pH?

@Bigby loved reading your smoke reports there, i have some Sannies Jack feminized about 6 weeks into flower just wondering about your harvest times, did you harvest both phenos around 10% amber? I would love to get the same effect you got, thanks man

need to take pics with light off, cant really see properly