New Growers Nutrient burn and ec problem
hopefully you can help
I have a grow that is showing signs of nutrient burn it’s most first grow using advanced nutrients connoisseur and The full range of advanced to go with it I’ve been guilty of neglecting my EC and after reading several of the posts on here I can see the error of my ways something that confuses me is my water EC appears to be 640 before adding any nutrients this is tapwater it’s been put through to fridge drinking water filters what are peoples average EC for their water I appreciate everybody’s will be different but I just feel mine is extremely high and wondering if I should use RO System and add Cal mag after .
this is a new house and I’ve only done three grows here and only dabbled in the past half-heartedly but I’m desperate to grow some decent product I am only a hobby Grower sorry for the long post
@ukcheeseplease71 Welcome to percys man, do you have apic of the plant mate? Advanced are very strong nuits. And the EC mater should display some thing like 0.6, or 1.5, if yours is showing number like 657, it is probably a TDS or PPM meter.
So let us know what model that is too so we can know what measurement it is
Thanks for the reply here is my dos so dos
They aint looking too bad mate, a little over fed but thats standard with advanced nuits
What are you feeding them, like what nuits, and how much of those nuits per litre, how often?
I found anything over 2ml per litre of advanced was too much, and they recommend four..... so over feeding is common with those nuits
And here are the meters I’m using
@ukcheeseplease71 Is that in water? Or in your nutrient mix?
@ukcheeseplease71 I live in a hard water area with an EC of 0.6 out the tap. I use canna nutes but always use less than the recommended doses. The highest EC I'd feed my plants would be 1.6-1.8. The plants will let you know. Just don't need as much Cal mag
Hi @ukcheeseplease71, welcome to Percy’s. I use Advanced Nutrients Sensi Coco in my grows. I find the charts from Advanced Nutrients are way too strong. My grows never go above 50% of what is recommended and mostly a lot less than that. I’d back off to half what you are using to start.
When I started my growing I was using tap water. I found out that my background EC was 540 on a good day so I switched to rainwater and it made all the difference in the world. I’ve also used RO water when there’s no rain and it’s great as well. Both get between 0.5ml/liter and 0.75ml/liter of cal/mag added. It doesn’t take very much at all.
As far as continuing to use that tap water, as a general rule you can ignore the first 300 in your background EC when calculating nutrient load but as yours is so high it also works against the plants uptaking nutrients properly. At 640 background you are already 340 into your nutrient load when you do the math. That’s not ideal but you can grow cannabis with tap water like that but it won’t be as vigorous or yield as much. You’ll probably have to use a good bit less nutrients to avoid the burn with that tap water.
Your pistils are still white so all isn’t loss. Plenty time to finish her right
Random acts of kindness make the world a better place
@macky your right it tells me to feed 4ml
I mix in a 20l bucket
here is the chart I am following
I am on wk4 now of bloom
So I assume you're feeding 4m,l per litre
OK, what i would do here, is dial back the a n b to 2 ml per litre, and only use big bud. Everything else is not really needed and is just for show IMO.
Use big bud up until the trichomes are 50/50 clear and milky, them hit them with over drive for a couple of weeks until flush comes.
The EC shouldn't go over 1.6 really, and if a remember right, each ml of nuits into one litre of water adds 0.35 to the EC. so 2ml will bring the EC to 0.7, without adding BG EC.
Make the rest of the EC up to 1.2 using the big bud, then your BG ec, and you should on about 1.3, which i think would be more suitable for the plants at that stage
If you use too much a n b, the plants get too much nitrogen, thats why they go dark like that. Reducing the a n b make them happier i think Then more big bud! lol
in water that has been through two small fridge water filters and then stored
After a while the oxygen is depleted in the water mate, so you cant let it sit long. no longer than 24 hours unless youre using an airstone
I have had them on ph 6 water for 24 hours do you think I should add nutrients with a fresh mix as per your recommendation thank you so much everyone for your advice it can be lonely out there and I’m not young so it’s nice to be able to talk to likeminded people
Also I have a brand new small RO system do you think I should use it
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