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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

never use softened water that uses Salt, you will poison your plants

You dont use jars at all? I might look into using paper bags next time just to see

Ive noticed that even when my jars get into the 62-65% range i still have to either open the jars for a while every day or take the buds out altogether for a little while- otherwise i get that kinda chorophyll smell which will go into the buds over time

ok cool - anyone wanna buy a Mars II? :P

Hi, i have a CXB3590 3000K fixture as my light but also have an old Mars II 400 - would the Mars be better for vegging? specs are 440nm, 460nm, 630nm ，660nm,730nm(IR), 2400k-3000k thank you

thanks to everyone - saves me buying a veg light fixture! is it worth adding any additions to my COB fixture to enhance plant development? Are there any proven methods? I see some people adding supplemental red or blue LEDs but not sure if they have been proven to improve a setup or just...

Hello - I am running a 3000K COB fixture, i grew 4 seedlings last time out, 3 of which turned out to be male. I was wondering if bluer light would lead to more females or is it purely down to luck? thank you

good to know, thanks for the info mate

those green cylindrical things? what is the exact purpose of those, ive seen them in a few grows - thanks

Trying to find some info on this but havent succeeded thus far - is it a problem if moisture gets onto the surface of active COBs, like from a humidifier? I can see documentation from Cree saying that COBs were tested at 85% humidity, so i dont know - i have emailed Cree and am waiting on a...

thats a bummer i dont have any other way of increasing RH

I got it sorted - 2 metal straps screwed into each corner and meeting in the middle, attached eye hook to the middle and its fairly level now is it a problem if my humidifier is blowing moisture up onto the COBs ? I dont have lenses on them