Spindle818
Well-Known Member
Those are actually near the end so the yellow is coming out from the ec being lowered substantially. Early flower I stack my media ec up to between 6-7 without any burn on the leaves
What ec do you all use with led
- Thread starter Thisguy-4'
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Thisguy-4'
Active Member
How dark do you usually let the leaves go before backing off with nitrogen
harrychilds
Well-Known Member
Every single leaf tip on your plants are burned at the tips, that's a massive indication that you are overfeeding, I don't know how you go to 6.0 EC without killing your plants, are you sure you're not talking about 6.0 PH?
Star Dog
Well-Known Member
Thanks for the pics, what's the idea /reason for the high ec?
Spindle818
Well-Known Member
I go into detail in the journal about my irrigation strategy, but during early flowering I want the plants to be in a generative state which requires large drybacks which in turn drives the ec up in the cube. Even if I was feeding 1.5 or 2 ec the drybacks would push up the runoff and media ec. It might work differently in coco, but I’ve never used that
Star Dog
Well-Known Member
Same idea in coco dry back raises the ec.
I've never found high ec correlating with good yeilds quite the opposite if anything.
Spindle818
Well-Known Member
I like to try to have controlled stress in the plants, but that’s just me. Please don’t take what I say as gospel, it’s just what I’ve found to make the best harvests for me. As far as yield I think that has a lot to do with the strain. That’s a 680 watt led and I’ve had a yield of under 2 1/2 lbs and as high as 3 1/2 lbs using the same regimen, but different strains
GrodanLightfoot
Well-Known Member
Switching to LED I raised Phosphorus, Potassium Manganese and Boron.
Sorry I don't know what bottled product those elements correlate with. EC doesn't make a fucking bit of sense. EC of what? Lead? Cadmium? Milk? Sodium? Cookie crumbs? There's 18 nutes and countless non nutrients contributing to EC. Those dark (phos), curled (boron), burnt tip (potash) plants with the light veins (manganese) don't need anything but phos (dark), boron (curled), potash (burnt), and manganese (light veins). Not "EC" whatever they fuck that entails.
Sorry I don't know what bottled product those elements correlate with. EC doesn't make a fucking bit of sense. EC of what? Lead? Cadmium? Milk? Sodium? Cookie crumbs? There's 18 nutes and countless non nutrients contributing to EC. Those dark (phos), curled (boron), burnt tip (potash) plants with the light veins (manganese) don't need anything but phos (dark), boron (curled), potash (burnt), and manganese (light veins). Not "EC" whatever they fuck that entails.
PadawanWarrior
Well-Known Member
I usually can't get on board with what you post, but I agree with the EC shit. And the K deficiency issues you're describing I've recently realized first hand.
7CardBud
Well-Known Member
I recently had this happen to me when I replaced my T5 nursery light with and HLG V2 4K. They plant kept growing, but the stems turned purple and the leaves were lemon yellow. Decent grow conditions in the basement 68F - 50%RH. I'm stilling learning the VPD crap and all so I figured it must be that the HLG V2 ran so cool compared to my other LED light, which is three HLG QB288 run at 450W. That light never gave me deficiency issues.
So, if the plant is slowly transpiring why would you only up certain nutrients and not bump total EC?
I'm also thinking of trying some off these next to the HLG V2.
Amazon.com: Simple Deluxe 25W 2-Pack Mini Ceramic Heat Emitter Reptile Heat Lamp Bulb No Light Emitting Brooder Coop Heater for Amphibian Pet & Incubating Chicken : Everything Else
The two plants got moved under my 4ft Veg T5s and they bounced back in a few days.
Now I have time to figure out how to mount those ceramic IR heaters to the HLG in a way that doesn't look like a ghetto hackjob.
So, if the plant is slowly transpiring why would you only up certain nutrients and not bump total EC?
I'm also thinking of trying some off these next to the HLG V2.
Amazon.com: Simple Deluxe 25W 2-Pack Mini Ceramic Heat Emitter Reptile Heat Lamp Bulb No Light Emitting Brooder Coop Heater for Amphibian Pet & Incubating Chicken : Everything Else
The two plants got moved under my 4ft Veg T5s and they bounced back in a few days.
Now I have time to figure out how to mount those ceramic IR heaters to the HLG in a way that doesn't look like a ghetto hackjob.
PadawanWarrior
Well-Known Member
I'm guessing you're a synthetic guy?
7CardBud
Well-Known Member
Ya, I use salts. I'm running Jack's right now, but I'm not brand picky...whatever I can get the cheapest. It's all the same shit in a bag.
PadawanWarrior
Well-Known Member
Unfollowed, JK man,
grotbags
Well-Known Member
its all about the variables!. it almost pointless to compare your grow to someone elses with completly different conditions.
the correct EC for a plant will change drastically depending on many different things, like type of strain, how much ppfd at the canopy, levels of co2 present, type of grow medium/grow system used, pot size/medium size, irrigation frequency, dryback times ect.
i have seen the same strain overfed in coco watered once a day at 1.4ec, and happy and thriving at 2.1ec in rockwool getting fed 14 times day.
Keep your room hotter and check leaf temps regularly.
You can run your rooms warmer too, that helps off set the drop is leaf temperature
Dividedsky
Well-Known Member
This is my first led grow from switching from hps...I run a sealed room with co2 and a 2- ton mini split...I've been running my rh between 65-70% Been feeding about 800-850 ppms every watering in r/o water...once in a while just water straight r/o water with a bit of calmag. In the room at the moment I have 2 growers choice roi-e720 leds, I will be adding 3-4 more roi-e720 to the room and will be hanging them this week. Here are my grandi guava and tiki rum cake that 25 days in flower.
