Jacks 321 yellowish leaves
- Thread starter canope
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canope
Well-Known Member
canope
Well-Known Member
@TintEastwood Any idea what I could be doing wrong?
TintEastwood
Well-Known Member
I only know coco....if it were my grow.
Would want to check runoff tds/ppm/ph and PH of soil. PH too low could affect uptake of nutes.
Immediately lower the Co2 to around 700ppm.
https://medteknutrients.com.au/co2-enriched-hydroponic-growing/
canope
Well-Known Member
Great I'll lower Co2 tomorrow and see if that works
TintEastwood
Well-Known Member
Koo
That link...
Be sure to read about the "night cycle" transpiration/respiration. I do better when I vent some during lights out.
farmerjoe420
Well-Known Member
you have any pictures ? 1100 ppm seems low for 321. Are you using exactly 321 or full strength? Also, are you using tap water ? If so, what is the ppm of your water ? How about brand of soil ?
canope
Well-Known Member
That's for 1000L, no idea about soil brand since I buy mature plants, long story. Using tap water, iirc it's around 90ppm
15-0-0 jacks: 660g 2.5g
5-12-26 jacks: 950g 3.6g
Epsom salt: 317g 1.2g
canope
Well-Known Member
This pic is from like 5 days ago and it's not color corrected so it's hard to tell, but plants that are getting the most light are turning super yellow and the ones getting less light are healthy green
TintEastwood
Well-Known Member
Interesting. For those affected.. It's the entire plant thats a lighter green?
Flippin sweet grow!
Flippin sweet grow!
TintEastwood
Well-Known Member
canope
Well-Known Member
Yes entire plants, the ones that are on the edge of the light spec are doing great. I feel like it could be a N defficiency, I'm trying to troubleshoot this with adding some 15-0-0 to 4 very yellow plants, I added maybe less than a gram to each plant thru top feed and once my regular irrigations sprays it will dissolve it and and hopefully I will notice a change, I started 3 days ago but still no change. Next step is recomp jacks 321 to have greater N and keep my ppm at arounf 1100
TintEastwood
Well-Known Member
Good strategy with the calnit.
Hope they start to improve. If you have a journal I need to find so I can follow.
Oh ya. Those leds are sweet. Have you ran under them in the past? I just started using them, strips, and quickly learned to respect the dimmer knob. Stressed the F outta the plants initially. Doh
Hope they start to improve. If you have a journal I need to find so I can follow.
Oh ya. Those leds are sweet. Have you ran under them in the past? I just started using them, strips, and quickly learned to respect the dimmer knob. Stressed the F outta the plants initially. Doh
canope
Well-Known Member
It’s in my signature link, it was for my forst run ever, this is my second run. Still learning lol
TintEastwood
Well-Known Member
I've probably been there at some time and fookin forgot. MJ memory.
farmerjoe420
Well-Known Member
If your noticing a absence in yellowing on the plants getting less light , It’s probably the light intensity. It’s hard for me to tell from the picture but do you think you have enough space between the lights and canopy ?
I had a issue myself when I first got these DE lights. I see lots of folks have that issue with LED’s because there so damn bright LOL. For my situation It was just too much for the plants. I raised my lights up all the way and the yellowing stopped and they greened back up.
I would try dimming the light some or maybe try upping the calnit like you mentioned. Your setup looks badass by the way !!
canope
Well-Known Member
Thanks, and yes but that's why I got the lights because they are bright af ahah so I really want to use it to the full potential. I'll remake a recipe with higher calnit and hopefuly that fixes it
Could it be the lights? I use Jack's 321 and use a few other things with it. A good amino acid with silicates, Neptune's harvest 0-0-1, humic acid and growers recharge. My ph is naturally stable though and ppm is 22 from the tap. I had some leaves getting spots but found it was an unlevel spot in my canopy and it was too much light