Hey I need some advice this is my first ever grow and I’m kinda worried. I’m in week two of flower and I’m starting to notice on the really big fan leafs that there are dark spots developing like kinda black at first and then they turn brown and wilt and the fan leafs are dying the spots are in the middle of the leafs and the leafs starts to curl and turn brown from the spots will attach pics of the plants later today when I get home. A couple days ago there wasn’t any spots and then the last two days the top fan leafs are developing spots and dying I need to know if I need to add potassium or what it needs. They are two blue cheese and the other one is a rainbow glue.
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Pics or it didn’t happen. 
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@2cashoneandonly we need pictures and more info to help you fix the problem my friend happy growing
I got bad signal I’m at work but it’s uploading right now. It’s a pic of one of the fan leafs in question I took a couple days ago before the spots started developing
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I posted a pic below it was taken a day or so before the spots started showing up on the big fan leafs
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Your plant looks fine. I wouldn’t worry about a few spots here and there. Plants are going to develop blemishes as they age.
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Ok I’ll post more pics tonite but so far it’s only the fan leafs that are showing spots and dying. I was worried I needed to add some nutrients or some thing. I also used fox farm happy frog mixed with roots organics mixed together so I didn’t think it would need any nutrients for awhile at least.
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About 4 weeks from the last transplant if in HF.
Ignore it if the lower leaves. The plant will naturally shed them as it ages.
Interveinal Chlorosis. Several possible factors, the most regularly seen is improper pH. Do you know what you pH is in your runoff?
It’s the very top fan leafs and the other plant it’s towards the middle of the plant that the fan leafs are showing issues. I mixed two dirts together happy frog and roots organic. So week 5 I’ll probably need to add some nutrients?
No I just use regular tap water I honestly didn’t know you gotta test the PH lol this is my first grow
Monitor runoff PPM and begin feeding when PPM dips below ~1,000, then maintain it there.
Your pH target range is 5.3 to 6.8.
Ph or some mag. Ph will appear to be many issues. Get that lined out and some top dressed epsom salts and watch. No major issues visible. Look good.
If using tap, it could have both chlorine and chloramine in it. Not good for cannabis. There is alot to unpack here.
You should use Distilled or RO water unless you know what is in your tap. You can get a report from your city. You could also use a carbon filtration system or just a filtered pitcher like a Brita to remove the undesirables.
Need a pH pen and a ppm pen to address these issues as they come up.
Cannabis cannot uptake nutrients if present in the soil if the pH is out of range for that nutrient.
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Ok I’ll just buy a bunch of distilled water and start using that from now on and I just ordered the pen to test it now from amazon. I’ll post the pics tonite when I get home so yall can get a better idea of what they look like.
@2cashoneandonly I agree with @MidwestGuy your plants look good my friend happy growing
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You need to test the PH which for pot plant the best range is 5.5 to 7.0. Most tap water is neutral which is 7.0 but you need to test it just to make sure. You can buy a kit at Amazon for about $20 and will last about a year if you are testing you water every day. Once you do the testing and adding what you need to get the PH where you want it, you will learn in after a few times of testing you will find this is not a big deal. I grow in soil, so I also use foxfarm grow big plant food 6-4-4 per instruction every 3 to 4 days and then when the plant start to flower I use a 3 combo plant food from Advance Nutrients /PH perfect technology.
I use 2/3 parts fox farm ocean forest potting soil with 1/3 coconut cour pith. The coconut saves me some money on the potting soil. But what is best about the ground up coconut shells is that it absorbs water, so your soil stays nice and moist under the light. I water daily. I only grow with auto feminized seeds so my plant are under light 20 hours a day.
No matter what happens your first grow please remember this is a learning experience, and you will get better with eaxh grow. My first grow I did with with fluorescent lights which are not really the best and got maybe 15 grams. I now get between 1 to 3 oz depending on the type of plant. All the item I mention above can be bought on Amazon.
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