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Shagreezz3
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I thought it could be the lights (even though it was closer than it is now the whole grow) and pulled them ALL the way up, high as I can, and I still get this, temp is usually about 80F or lower, there have been days where I come home, check the monitor and it hit 90 during mid day, but that was only a few times during summer, past 2-3 weeks been steady around 80, too high?Welcome to the farm
Not a terribly accurate answer but too much N & not enough P or K for the stage of growth. That's usually one problem with "set it and forget it" types of soils. She looks a little light or heat stressed as well which could be playing a part.
Interesting two of you mentioned the lights, im going to take a pic when i get home but i have moved them as far away from the plant as possible and its in the lowest settingI had that problem a year or so ago. My problem was my lights were to close. The yellowing and necrosis of the tips looked identical to yours.
Try to back your light off.
Thanks for this, ive seen it before, however, how do i determine like yes it 100% is lacking copper (just random example) before i go adding stuff in? The leaves look similar to a few issues on that page, i dont want to over do it and start adding too much stuff and make things worse if that makes sense? Really appreciate the response thoughPlant Doctor - Diagnose Your Cannabis Plants! | Grow Weed Easy
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I agree it does look similar, but i feel it looks even more like the light burn/light stress pics they have up there, so confused right now as to how to move forwardLooks similar to this.
View attachment 1282542
If you can download the Photone app then you can measure an approximation of your DLI or par to determine if it’s to strong. Do you have a dimmer function on light?I agree it does look similar, but i feel it looks even more like the light burn/light stress pics they have up there, so confused right now as to how to move forward
Edit: would you suggest i try adding some P since I already have my lights as far away as possible? Also is there like an actual test i can do to determine what is causing this for sure? Thanks for all your help, i think your onto something with this , recommend any product?
80f is fine.Interesting two of you mentioned the lights, im going to take a pic when i get home but i have moved them as far away from the plant as possible and its in the lowest setting
Temps avg around 80f , think this cud be a reason? I want to put these into flower but afraid to do so without addressing this yellowing
I would rule out ph first before adding nutes.Thanks for this, ive seen it before, however, how do i determine like yes it 100% is lacking copper (just random example) before i go adding stuff in? The leaves look similar to a few issues on that page, i dont want to over do it and start adding too much stuff and make things worse if that makes sense? Really appreciate the response though
Ok, should i just go on amazon and type in soil ph tester?I would rule out ph first before adding nutes.
tell us all about your light
Product and Mounting Dimensions - LED Grow Light | |
Light Dimensions | 23.62 x 23.62 in. (60.0 x 60.0 cm) |
LED Board Thickness | 0.43 in. (1.1 cm) |
Driver Dimensions | 10.74 x 1.75 in. (22.5 x 4.5 cm) |
Product Performance and Technical Specs - LED Grow Light | |
Coverage | 4 x 4 ft. |
Diodes | Samsung LM301B |
LED Chip Count | 1024 |
LED Driver | AC Infinity Proprietary Driver, Model GTS-100 |
Efficiency | 2.75 µmol/j |
PPFD | 1937 PPFD |
Spectrum | 660nm, 730nm, 3000K, 5000K |
Wattage | 400 W |
Voltage | 100-277V AC |
Frequency | 50/60 Hz |
Current | 2.0 A |
Controller | Digital Dimming Timer |
Power Connector Type | US Plug (NEMA 1-15 Type-A) |
Operating Humidity | 35 to 85% RH |
Operating Temperature | 32 to 140°F |
Life Expectancy | 50,000 Hours |
Good info. Is this because the light intensity caused the plant to use all of its reserves and shows as a deficiency? Do you solve this my reducing light or increasing nutes?It could easily be both a potassium deficiency AND light burn.
What seems to happen with LEDs is Leibig's Law of the Minimum rears its ugly head. Suddenly there's more light, so some nutrients become the limiting factor in plant growth. It seems like this is especially true of potassium and magnesium -- the burn looks like the deficiency symptom.
BTW, when you get a mobile nutrient deficiency, like K or Mg, those deficiency symptoms on the lower leaves never go away. You know you've solved the problem when the symptoms stop creeping up the plant toward the top.
Get a decent one. Not those $10 ones. If you drop those in the tank they are toast. I had an Apera that was nice but the probe wore out so I think one with a replaceable probe would be a plus.Ok, should i just go on amazon and type in soil ph tester?
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