Yellowish, brown, orange spots on leaves.

Hey all,

First ever time growing any plant. Appreciate any help.

• Indoor 2x4 grow tent
• Autoflower
• Fox Farm Ocean Forest Soil
• Plants 4 weeks old (vegetative)
• Plastic 3gal pot

A little over a week ago (schmurda dance), I started noticing these small yellow spots on 1 of my plants which are now darker and brown. This was the best plant out the bunch initially.
The mid/ lowe—level leaves had more of these spots and the lower-most leaves were turning yellow from the outside in.
After doing research, it was appearing that this was Leaf Septoria or Nitrogen defficiency.

Based on research I….
1. trimmed the lower yellow/more abundantly spotted leaves
2. Added more nitrogen (Micro nute) to the feed (was doing a minimal feed initially)
3. Made a light mixture of fungicide to spray and applied twice throughout the past week.
4. In case the soil was over saturated and not draining, I attempted aerating the soil with a long pick. I also poked some additional holes at the bottom and bottom sides of the pot to introduce more air flow.

I’m not certain I took all of the appropriate actions so can someone, based on my description, let me know what they believe this issue is and if the actions taken were appropriate. If you have suggestions I’m all ears.

Green Shed said:

Hey all,

First ever time growing any plant. Appreciate any help.

• Indoor 2x4 grow tent
• Autoflower
• Fox Farm Ocean Forest Soil
• Plants 4 weeks old (vegetative)
• Plastic 3gal pot

A little over a week ago (schmurda dance), I started noticing these small yellow spots on 1 of my plants which are now darker and brown. This was the best plant out the bunch initially.
The mid/ lowe—level leaves had more of these spots and the lower-most leaves were turning yellow from the outside in.
After doing research, it was appearing that this was Leaf Septoria or Nitrogen defficiency.

Based on research I….
1. trimmed the lower yellow/more abundantly spotted leaves
2. Added more nitrogen (Micro nute) to the feed (was doing a minimal feed initially)
3. Made a light mixture of fungicide to spray and applied twice throughout the past week.
4. In case the soil was over saturated and not draining, I attempted aerating the soil with a long pick. I also poked some additional holes at the bottom and bottom sides of the pot to introduce more air flow.

I’m not certain I took all of the appropriate actions so can someone, based on my description, let me know what they believe this issue is and if the actions taken were appropriate. If you have suggestions I’m all ears.

Click to expand...

Without even reading your post your pictures indicate a nasty spider mite infestation.

Beginning stages:


Heavy infestation due to the gardener not using an integrated pest management system


Finally you have death of the plant when it can no longer sustain itself as the spider mites consume it. This is typically what you'll see in veg. In flower they'll spin webs allover your buds as spider mite super highways. I saw that on my first grow 12 years ago. It was like losing my right arm. I was devastated for weeks. I saved the harvest though. Mites suck sir.

Yellow stippling on the leaves combined with leaf droop (as the damage progresses) is the telltale sign. Get a 40x scope to inspect for pests.
I'd recommend https://www.amazon.com/gp/product/B000Z3A8UY/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
It's the best scope I've ever used and I've been through quite a few of the economy models. You won't find a better scope in this price range.

This is what mite eggs look like. Typically you'll see the eggs far before you see crawling mites.

If you see crawlers and you're not in flower I'd throw them all out, sanitize with 10% bleach solution, and start over. You'll never win the battle with a heavy infestation no matter what you do. I've never seen a crawler in my garden on a leaf and god willing I never will.

Thanks! @jonnynobody The condition did worsen and I tossed the plant. I do have 2 others in that tent that show no signs of infestation. I’ve been treating those 2 with a neem oil/fungicide mix so hopefully they stay healthy because the growth on them is great.

Would you recommend I remove them from the tent now and do a clean and add them back?

Thanks for all your help.