My girls are autoflower girl scout cookie extreme. Ph is 6.5 only 2 fan leaves toward the top of the plant has red stem and noticed this yellowing and brownish bronze spots starting now. It’s had red stem for a week. The rest of the plant is good. I put them in 12 12 lighting as looks like blooming is going on. Temp is controlled 75. Humidity is controlled 45ish. I gave it only 1/8 tsp to gallon this morning of bergmans fertilizer for grow time. Don’t know if i need to switch over to bloom time fertilizer yet. Didn’t know if this is magnesium or what. It’s only 2 leaves. Do I cut them off? They red stem with yellow spots and brownish. All else looks fine. Please help. I only used happy frog soil with nothing hot added. I fertilize to see if that helps but don’t know if i should go to bloom fertilizer. Thanks for any input to why this happened.
Switch to bloom. Your in flower now.
What BetrayedSoul said. Back off the nitrogen too. She’s had too much.
im using the fox farms trio do i cut the grow big out fully and just use the tiger bloom and big bloom?
Don’t know anything about your plants. Can you please provide some pics, tell us how old your plant is, and fill out a support ticket? We’ll be happy to help.
Can you please fill out a support ticket? Please include what type of water you’re using.
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Look at your bottle ratios and do some research online to see where you can cut the nitrogen back. In flower you can run the Lucas Formula and completely cut out the Gro bottle.
No need to change lighting schedule if they are autos 
probably my problem i havnt flushed once do you know how the sledgehammer works?
Ive never used it. I have used florakleen. Basically just follow the directions.
One can also use straight pH’d water. 3-5x the container size. So for a 5 gal container youd use 15-25 gal of pH’d water.
alrighty ill probably just do that then thank you
You’ll know when your done when the runoff ppms drop to 300-400ppm above the input ppms.
You about 3 weeks into flowering?
I don’t know who’s talking about my post or the other person that replied his problem on my post lol
My ? Was directed to your original post. Is the plant pictures about 3 weeks into flower? The dark green leaves, red stems and spots makes me think you have a phosphorus deficiency going on.
Thanks for letting me know. I just switched over to bloom fertilizer. Do you think this will help? Also do i cut those 2 leaves off or will it affect the flower in anyway to leave it on since stems are red and more signs of yellow spots? Thanks as I wasn’t sure who was actually applying to my original post lol
Sorry. My bad
I have used sledgehammer without incident and it works great, atleast it did for mine… I just followed the bottle directions and 2 extra gal of clean water put thru and they responded well within a couple days… Do not over do it ! Follow the bottle and you should be good and so will they.