Yellow Leaf Spot?

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Plantinit

Well-Known Member
Is this Yellow Leaf Spot and do I need to spray it with a fungicide?

Age: 3 weeks old

Temp: 77 F to 86 F

Hum: 54% to 61%

Air Circulation: 1 pedestal fan and 1 floor fan

Water PH: 6.25 to 6.5

Feed: Have only fed them once and that was 4 days ago. 1/4 tsp of Cotton Candy and 1/2 tsp of Mega Crop to a gallon of water.

Light: QB 288 at 24 inches

Soil: Scotts organic with about 50% perlite.

seedling 1.jpg Seedlng 1.1.jpg
 
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Beachwalker

Well-Known Member
Not sure what you got going on there, don't think it's leaf spot, check & eliminate the possibility that it's bugs and after that adjust your pH always to 6.5, 6.2 is too low
 
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Plantinit

Well-Known Member
Beachwalker said:
Not sure what you got going on there, don't think it's leaf spot, check & eliminate the possibility that it's bugs and after that adjust your pH always to 6.5, 6.2 is too low
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I check the plant with a loupe and clip the leaf and checked under a microscope and I didn't see any bugs.
 
3rd Monkey

3rd Monkey

Well-Known Member
Plantinit said:
I haven't fed them anything other than Mega Crop and Cotton Candy. I have liquid kelp and cal mag, but have been hesitant to use it.
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Yea it's cal/mag deficiency. Check your ph to make sure, but definitely cal mag. Can't believe you got that far without issue lol. Nice job though. Looking good.
 
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Beachwalker

Well-Known Member
Plantinit said:
I check the plant with a loupe and clip the leaf and checked under a microscope and I didn't see any bugs.
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Good. Your pH is too low and your likely seeing a lock out, adjust it to 6.5 going forward and it should correct that issue, good luck

Ps. I had almost the same issue as soon as I started using Mega crop. They've since changed the product because so many others were having similar issues with calcium and magnesium uptake but in your case I suspect it's the pH
 
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Beachwalker

Well-Known Member
Plantinit said:
I haven't fed them anything other than Mega Crop and Cotton Candy. I have liquid kelp and cal mag, but have been hesitant to use it.
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A plant that size in fresh soil is likely not lacking anything, it's being locked out by pH

also I can't keep correcting this new guy above all over the board so I won't read him anymore so I'm not going to know what other incorrect info he's giving you going forward, so do what you feel is right op, good luck

Btw this is yellow leaf spot AKA septoria, it's not what you have 20180612_034240.jpg
 
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3rd Monkey

3rd Monkey

Well-Known Member
Beachwalker said:
A plant that size in fresh soil is likely not lacking anything, it's being locked out by pH

also I can't keep correcting this new guy above all over the board so I don't read him anymore so I'm not going to know what other incorrect info he's giving you going forward, so do what you feel is right op, good luck
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Boron absorbs best between 6.0-6.5. After 6.5, it doesn't absorb well.

You think it's ph because of spotting which is common, however the ph is fine. It's cal mag look at the damn plant.
 
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Beachwalker

Well-Known Member
Here's a chart and a good website that will explain why you're seeing a deficiency related to pH

https://www.growweedeasy.com/ph

Screenshot_20190214-200744.png

Edit: also not sure what Scotts product your using but most of them have time released nutrients in it, I'd recommend going with a different product in the future without that in it
 
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CannaCountry

Well-Known Member
Firstly, be cautious of some of the information being tossed about like gospel here...this is probably you and everyone else's biggest hurdle in getting started in this hobby.

Your soil already contains nutrition; I would be very careful as to how much additional feed I introduced and how often. Soil will have the tendency to hold nutrients longer so don't over do it.

Manage your pH...both when you just give water and when you feed. Always.

Don't knee jerk anything. Your plants look pretty good. If it were me I'd be sure I had a handle on my pH and I'd feed just the Megacrop and your CalMag supplement (perhaps the plant is a smidge short on Mg, however, I would let her go for the moment otherwise). Leave the other stuff out until you get this plant to where you want it...don't over complicate your life by adding too many things.

Good luck; you'll be fine.
 
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