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Sick Plant Yellow cruling leaves

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Terpinolene
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Don't Have a clue lol

Grow Light
Temperature C/F : (Light on/off)
Picture of Problem
1680132543-20230330_001306.jpg
Nutrients

Top dress worm cast ,water

pH Level
Feed Frequency
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BubbleHok
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@maddog-uk how old are they mate? I know when I used hps many moons ago around week 5 I would give them a good dose of calmag and nitrogen. Being your in living soil a nice top dress and an Epsom salts spray should help bring them around.

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monkeydo
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@maddog-uk is there any way you can get a lights off picture. That light looks very HPS like off color and it’s difficult to diagnose from that picture.

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Yeah about 5 weeks in will have to get some salts will try thanks mate πŸ‘Β 

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WoodI2
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Β  Knowing the PH is crucial, if the PH is off and the water that your using isn't PH'd then anything else you add or do is just a shot in the dark. Just a simple liquid test kit from the fish store will give a better idea than nothing. But make sure your input water PH is good especially with living soil, once this is correct the living soil can work the way it's suppose to.

Β Just my thoughts, I hope you get things sorted, good luck man. πŸ–οΈΒ  Β  I was told to keep mine at PH-6.50-6.85, this is the sweet spot.Β 

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@woodi2 will do thanks mate πŸ‘

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im_sparky
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@woodi2 Good advice -- 6.5 or 6.6 is perfect for most nutrients in veg and flower.Β  Good luck to you @maddog-uk. I'll look for updated photos when you have the chance.

Β 

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Philmebowls
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Like Monkeydo posted above ..It seems like your light has saturated the photo making everything a tint yellow . Or is that what the plant really looks like ?Β 

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Terpinolene
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Any better

20230330 005945
20230330 005935

Β 

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Sirgrowsalot
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I can't tell from the pics,Β  sorry. Id start with PHing the h2o first that seems to be at the root of a lot problems,Β  no pun intended. Also there's an app called growcush, tried it just to try and see if what I thought was my issue was my issue,Β  seemed to work fine. Good luck

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SouthSilly
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Caryophyllene
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those new leaves look pale, when you took these pics was it at the start of lights on?

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SouthSilly
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how about any larger lower fan leaves, how do they look?

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SouthSilly
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Caryophyllene
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I have attempted to colour correct the pics you posted, hope it helps diagnosis

PGR (2)
PGR (3)

Β 

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SouthSilly
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Id agree with the above suggestions but Im going to assume your soil is wet right now. They are most likely not drinking much in this condition. If it is you could top dress like Bubble said, just wait to water it in later.Β  If you cant water yet, you could foliar spray epsom salts and or a worm casting extract during lights out.

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monkeydo
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Thanks @southsilly, that’s a big help. Im falling into BubbleHok’s idea based on those pictures. Epsom salts spray and a light top dressing.

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SouthSilly
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@monkeydo no worries man, I use lightroom a lot so its quick for me.

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im_sparky
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Not sure where you are at with this right now, but its clear there are lots of people who would like to help.Β  Trouble is, there are several things that can cause these issues, and without more specifics to go on, it is going to be impossible to narrow it down to get to the cause.

Maybe this will help:
Yellowing at the top of the plant as shown in the adjusted pictures is a classic indication the plant is low on iron OR manganese.Β  If your soil recipe is a good one, but your pH has increased from giving tap water that has not been pH adjusted, then Mn deficiency is the likely issue due to pH lockout.Β  If you have very pale leaves, maybe almost turning white in extreme cases, then its likely iron.

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SouthSilly
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@im_sparky he posted another better image on new thread.

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