Anyone know what’s going on here

im getting really good growth they are only 8 days old from breaking ground but just starting noticing these spots on my plants.I’ve looked into it and couldn’t find much. I’m feeding house and garden at 1.0ec and I’m at 6.0ph any tips appreciated

EC kinda high for a tiny plant like that you feeding everytime?

Jjgrow420 said:

EC kinda high for a tiny plant like that you feeding everytime?

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I’m growing in coco so yes I feed twice a day and always with nutrients

Tip burn on new growth says, EC too high.. What light? How close?

Do you have holes in those cups? I'm assuming yes. Also curious about your lighting specifics.

twentyeight.threefive said:

Do you have holes in those cups? I'm assuming yes. Also curious about your lighting specifics.

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There are holes in the cups and I’m using the kind led x420 at 75 percent. It’s about 4 feet from plants.

twentyeight.threefive said:

Do you have holes in those cups? I'm assuming yes. Also curious about your lighting specifics.

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That was my first thought to because after inspection all my plants have a tiny bit of yellow at the tips on the new growth.

What’s the ph of your water? Are you using tap water from a well or city?

1st post ever here and still on 1st grow but would think burnt tips on new growth could be the light. Seems too much intensity at 75% and also 4 feet away seems far. I have a 600w hlg blackbird and 2nd week in flower and have never had it above 50% and no closer than 30" yet. When was that size I had light on about 25% and 3 feetish. Just a thought. Maybe get a free app like photone or ppfd meter and check the readings compared to where you should be now. Also can just do the hand test and so long as it isn't too warm with your hand then it probably is fine for the plant

Liger said:

1st post ever here and still on 1st grow but would think burnt tips on new growth could be the light. Seems too much intensity at 75% and also 4 feet away seems far. I have a 600w hlg blackbird and 2nd week in flower and have never had it above 50% and no closer than 30" yet. When was that size I had light on about 25% and 3 feetish. Just a thought. Maybe get a free app like photone or ppfd meter and check the readings compared to where you should be now. Also can just do the hand test and so long as it isn't too warm with your hand then it probably is fine for the plant

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So the x420 is 420 watts so at 75 percent it’s roughly 300 watts which is about where you are with your light as far as ppfd goes. I do have that app and I get about 400 ppfd at canopy.

Cheech2010Flhtk said:

What’s the ph of your water? Are you using tap water from a well or city?

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Ph water of my solution is 5.8 to 6.2 I started on the higher end of that because I was told calcium intake is better with a 6.2 ph and growing in coco I needed that. I’m also using ro water with Calmag to stable it.

Cheech2010Flhtk said:

What’s the ph of your water? Are you using tap water from a well or city?

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OP says 6.0

I would think that and the EC is a little high (or ph too low rather) for a 8-day old plant, but idk.

Gauging by the size, OP, you wouldn’t by chance be running 24hr light too would you?

Coco-garden said:

So the x420 is 420 watts so at 75 percent it’s roughly 300 watts which is about where you are with your light as far as ppfd goes. I do have that app and I get about 400 ppfd at canopy.

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When I was in seedling stage like that I was on lowest setting or 2nd lowest setting of a 600w so was more like 100-150w tops. I was in 50/50 coco/perl and went through same thing. If you at 75% what are you gonna do in veg? 100%? Then what happens when flip to flower just stay at 100%? I could be wrong but it should be more of a sliding scale from seedling to veg to flower and at 75% you don't have much room to increase intensity cause already did. I know all lights are diff but that seems crazy high for a couple week old plant and also way too far away. What do you think would happen at 25% and much closer like 28-30ish?

Nice light! I was checking it out. https://growershouse.com/kind-x420-targeted-full-spectrum-led-grow-light
Looking at the picture they have on their site it says for germination seedling stage should be 25%. I'm kinda stoned so I couldn't find where they had the distance it should be from the plant though. my 150 w LED's say 18 - 24 inches at seedling stage. I def think 75% is too bright

Liger said:

When I was in seedling stage like that I was on lowest setting or 2nd lowest setting of a 600w so was more like 100-150w tops. I was in 50/50 coco/perl and went through same thing. If you at 75% what are you gonna do in veg? 100%? Then what happens when flip to flower just stay at 100%? I could be wrong but it should be more of a sliding scale from seedling to veg to flower and at 75% you don't have much room to increase intensity cause already did. I know all lights are diff but that seems crazy high for a couple week old plant and also way too far away. What do you think would happen at 25% and much closer like 28-30ish?

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So that’s kinda why I have them so high so that way I can lower it during veg for more ppfd. Also during flower there is a separate uv,red and IR channel that’s currently on 0 percent which i would turn to 25 percent 50 then 75 and so on. The reason the light is so far away is because my driver is outside my temp because I was dealing with high temps and the cord for the driver to the light is very short so I can’t lower it much.

so this is what they look like now. I’m not an expert but from everything I’ve read and watched this seems to be a magnesium deficiency. I am getting yellowing i between the veins and I’m using coco with ro water and a led light. Seems to be the best thing I can come up with. Anyone else agree?

have you been feeding her any cal-mag?

Liger said:

have you been feeding her any cal-mag?

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Yes I use ro water and I am giving it 2ml per gallon bringing my ec up to .2 then adding the rest of my nutes in.

I see light stress. Turn it down to 50%.

I've been having this issue w Coco under LEDs for a while and after chaising my tail I came to the conclusion that my high VPD was causing my plants to uptake too much calcium during transpiration, causing Magnesium and Potassium deficiencies.

The first sign was plants that were perfectly happy vegging under my T5s, would droop and curl badly just hrs after they were put under the LEDs. Then I would get the yellow spotting on the upper leaves, leading to full on interveinal chlorosis. (Mag Deficiency) Lower leaves would yellow and scorch from the edges inward, stems and petioles would turn purple and growth would slow to a crawl.(Potassium Deficiency) I was also getting tip burn at insanely low EC levels, but the plants would always show those same symptoms yours have.

I stopped my calmag supplementation for 2 weeks, raised my temps and humidity to about 80F, 70%Rh, and everything is finally pulling around and giving me lush green growth again. After doing tons of reading and research and pulling my hair out for months, this was the solution for me. It was all because my low humidity. Was never a problem under HPS or T5s, but proper LEDs made them freak out until I got VPD in check.

This might not be the case for you, but figured I'd share what I've found since I see the same symptoms with your young plants