What is this? My outdoor plants are yellowing fast with brown spots. What to do?


I planted my marijuana plants in my garden and cannot get rid of these brown spots on my leaves. I have given it nutrients and spray NEEM oil. The nutrients didn’t seem to work as I am in really good soil. I’m thinking it bugs and I need to keep spraying Naimh oil. Thoughts.?

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I agree that it looks like something’s eating them. If you inspect carefully (perhaps with a magnifier), you may spot the culprits. If you do and post photos, someone here can probably ID them. Knowing the enemy makes it easier to know how to be rid of them.

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I like Neem oil too but sometimes I have to bust out the Capt jacks DB…I started mixing the concentrate instead of the regular spray though. Usually works for me.

Neem Oil isn’t really suggested too much for cannabis, nor other oil based preventatives. The oils are absorbed by the plant, and if you are in flower, it doesn’t rinse/wash away from the buds.

For pests, Captain Jacks Dead Bug is a good quick kill, and can be used daily if infested. I get the concentrate and mix at 1.5x strength. It’s also a good idea to get 1 or 2 other products to rotate through, as some pests develop a resilience to products.

You mentioned really good soil and nutrients. Is the soil just what is natural in your environment? Is it a mix of your own? Can you elaborate? And which nutrients? I’m inclined to think you have more of an uptake problem with the plant, not as much as pests. Is your plant in ground or in a vessel?

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Could be little critters, Also my, ME own often wrong but it COULD be neim oil burn, ??? u spray only after sundown?

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You know I went back, and I looked at your pictures …which by the way are very good! I got kind of close up .. I have seen this the first time I use neem oil… it looks like Burns. Stop spraying it, for right now.. cut all those leaves off …your girl is going to try and put so much energy into repairing… to much energy into those leaves trying to keep them, cut them off, and make sure you only spray that neem oil, or ANYTHING on your plants, only at DUSK, SUN DOWN and again this is my own opinion, and again I’m offten wrong LOL I don’t mind being wrong cuz that’s the way I learn baby LOL but i have done this same thing more than once, thinking it was a bitchfest of bugs, so neem it, got worse l… i cut all the affected leaves, nursed the plants, and they quickly recovered, thats when captn jacks became my go to, the mix it yourself kind, DONT GET TH PRE-MIX, don’t work!!! good luck

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Strongly Agreed.

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Leaf septoria possibly??

You need a fungicide to treat it. I use copper fungicide during veg

If you guys have some good idea how to get rid of this, I have the same problem. On the lower leaves, tearing them out each day, even tries neem and lolipooping them to acces more air, but they still spotting…

Wanna try some fungicide, but dont know which base fungicides are ok for plants..

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Copper fungicide works well but you can’t use it if your in flower. I use an assortment of different things during flower like lost plant therapy, pure crop 1, Dr zymes eliminator, and green cleaner. I can never get rid of it though i can only slow it down

14days till flower, still some time to try it out… so tomorrow tryout it is I guess :slight_smile:

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Are they getting enough calcium and magnesium?

Are you spraying anything on the leaves during the middle of the day when it’s hot?
If yes, then it might be chemical burn from fertilizer or Neem oil heating up from bright sunlight and burning the leaves. Leaves should be sprayed early in the morning or just before it gets dark (preferably in the evening) so the leaves don’t burn.

I have sprayed Neem oil on all of my outdoor plants twice. Both times in the evening. It was hot as hell though. It could very well be chemical burn. Thanks

This is what I’ve used to combat leaf septoria the last few years and it’s worked very well, just need a bud wash at the end, I’d hold off on neem oil that stuff really seems to stick to all the plant matter and doesn’t wash out after harvest.

Also just food for thought the leaf septoria normally just kills all your leaves and doesn’t touch the flower but once the leaves die and wilt they will mold if not picked

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