Discoloration in fan leaves and tips. What am i doing wrong?

Hello fellow growers. I am a first timer and i am growing 3 autoflower plants in a 2x2 tent. I habe started to see funny coloring on the leaves of two plants and it also looks like the tips are beginning to turn yellow. Is this from some
deficiency or is my light too close? I want to solve this issue before it gets any worse.



I also have one plant with purple-like stems. Is that an issue or normal?

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Purple is common on some strains. As for the bleaching better eyes on coming i am sure. Also i expect a support ticket to pop up shortly. Welcome home and relax. You are covered here. Fill out that ticket when hits and the community will get right on it. Everyone truly wants everyone else to succeed.

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Thank you Storm. Appreciate ya !

Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so = NA

Strain; Type, Bag seed, or NA

Soil in pots, Hydroponic, or Coco?
System type?

PH of runoff or solution in reservoir?

What is strength of nutrient mix? EC, or TDS

Indoor or Outdoor
Light system, size?

Temps; Day, Night

Humidity; Day, Night

Ventilation system; Yes, No, Size

AC, Humidifier, De-humidifier,

Co2; Yes, No

Here ya go. Our members are all over the place. You will get answers in their timeframes. Even those Aussies can grow…lol J/K guys. Loved partying with you guys back in the day.

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Strain : BB, GG, GSKE
Fox farm soil
Havent measured ppm
Fox farm trio 1/4 strength(grow big and big bloom) and calmag 1ml
Indoor tent
24 hr light 23celcius 45 to 51% humidity
Light 100 watt i believe (spider farmer sf1000 kit)
Vent yes (size spider farmer sf1000 kit)
Humidifier yes
Co2 no

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You will get some good responses. I use a different soil but many use what you are. Small light though i think.

Yes that light is the minimum i believe. I may upgrade after this grow.

looks like magnesium deficiency to me.

Depending on how long they have been in the soil you probably need to increase amount they are fed. You also need to PH & PPM what goes in and the runoff. If you do not you are literally blind with no clue what may be causing problems. (I made it through 2 1/3 grows until I couldn’t).
Increase calmag to full dose. Give calmag next time you water. Then feed them the next time. This is the typical schedule with the Trio: Feed - Water - Feed

Three plants in a 2x2 is a tight squeeze but doable if you manage their size and shape. Also, a little underpowered for light.
Good luck

I’d say you might need to bump those numbers up a bit. I use Happy Frog at half strength…

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I put my water in at a 6.3 ph every time but i do not check the ppm. I have a ppm meter so i most certainly will from here on. I am also going to focus on just one plant next time because like u said “its a tight squeeze”. Thank you for the insight, I hope these girls make it !

Planning on moving to half strength due to suggestion tips from you and Beardless. Thanks a mil.

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They should do fine. Feed them well, give them a shot of calmag now and again, and monitor the Ph & PPMs, and they should thrive. Somewhere along the way, around 3 or 4 more weeks you may need to flush them. It is why it is in FF schedules.
You can check @Work4iT thread. He grew four autos in a 2x2.

But I think 1 photo would do really well in a 2x2 space.
My scrog frames are about 2x2.
One plant can fill it up

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I am about to water now and do my first ppm test. I actually didnt even notice on the FF feeding chart where is says to flush. Thank you for that tip as well. I am going to order the product, hammer flush, as the chart suggests. Those wedding cake pics are beautiful. Wishes wishes lol

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I gave the GG auto calmag and raised my nutrients during this feed to 1/2 strength. I checked the runoff and got a 6.4 Ph and a 2603ppm. Ppm too high?