What defency is this? Autoflower

I haven’t fed these baby’s yet they are about 3 weeks old symptoms started 3 days ago. I assume it’s cal mag but wanna make sure. Using happy frog soil. Plants aren’t under/over watered from what else I can tell they seem happy. I have cal mag and grow big can someone tell me those dose per gallon for a combined mixture as I haven’t done this in awhile and Ohio just went legal. They’re are a few small orange?? Dots. Almost looks like a rust color. Only 2 of my 4 plants are showing this as of now they are the same strain the other two are different. 600 watt grow light

Better pic words the edge of the leaf u can see the dot.

There going to want to know temp humidity how far light is away from plant for others to help better. But if haven't fed needs nitrogen to start since haven't gave yet. Just letting you know real people that know want details as much as possible to diagnose

dont think its calmag.
I cant see any brown dots and the yellowing is on the veins.
magnesium is typically yellowing between the veins (interveinal chlorosis).
have a cup of tea and carry on

They probably just need to be put on a feeding regimen. Not calmag related. What's your media, ph, R/H, ligt type and distance from plants. The only thing I see is the curled leaf edges which could be heat/light, or R/H related.

Phytoplankton said:

They probably just need to be put on a feeding regimen. Not calmag related. What's your media, ph, R/H, ligt type and distance from plants. The only thing I see is the curled leaf edges which could be heat/light, or R/H related.

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Yea I’ve moved the light up high since then it was heat stress indeed thank you.

LegalgrowZ said:

I haven’t fed these baby’s yet they are about 3 weeks old symptoms started 3 days ago. I assume it’s cal mag but wanna make sure. Using happy frog soil. Plants aren’t under/over watered from what else I can tell they seem happy. I have cal mag and grow big can someone tell me those dose per gallon for a combined mixture as I haven’t done this in awhile and Ohio just went legal. They’re are a few small orange?? Dots. Almost looks like a rust color. Only 2 of my 4 plants are showing this as of now they are the same strain the other two are different. 600 watt grow light

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My 2¢

As far as GrowBig - use a capful per gallon of water - mix well and add to plants. No PHing needed.
Use simple tap water.




Stay away from Fox farm feeding schedule - they list extreme amounts and multi bottle BS.
GrowBig is For Veg.
Tiger Bloom for Flower.
“ Big Bloom “ is a micronutrient solution for the medium. Not Bloom . Name is a little deceiving. Maybe Big Bloom means microbial bloom in soil - who knows ? At least it is organic.

Fox Farm nutes can be concentrated and easy to overuse. It salts up your soil fast so less is more .
Your medium looks a bit dry - you can also mist them plants. Happy Frog should have enough blended nutes within but this soil should be considered as a mild potting mix and may not be too nute dense for plant.

Feed that GrowBig once a week for now. ( Feed / Water / Feed )
Don’t add a bunch of other things let soil do its thing.
Keep things simple.

GL