Leaves on one plant yellowing, any advice would be nice

First grow, really nervous. 8 weeks in. Using GG autoflowers from ILGM.com. Great lakes water only soil, HTG 4.0 540w LED Grow Light, I’m only watering with RO water.

On this one plant, a lot of leave are losing their color and some of them are turning yellow. Nice large leaves that are getting a lot of light, not leaves at the bottom. Even the best leaves at the very top are starting to lose color.

I appreciate any advice, pretty freaked out about my baby.


Here is a support ticket. Please Fill it out and it will help get specific help.

COPY/PASTE the below list into your forum post.

Answer these simple questions the best you can.
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  • What nutrients are you using and how much of each?
  • What strain, Seed bank, or bag seed
  • Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF
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  • PH of Water, Solution, runoff (if Applicable)
  • PPM/TDS or EC of nutrient solution if applicable
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Your soil is running out of nitrogen.

Must not last much longer than 8 weeks. Most tap/well water also has some minerals and stuff in them. Like nitrogen.

That’s a big girl. She needs more food than is being provided

Not sure how a ticket will help when every answer they could provide that would help is already provided. pH and ppms are irrelevant as of so far. With their apparent super/living soil. It’s just run out of steam. Needs a top dressing or you’ll need to supplement some salt nutrients till the finish. If you have any compost to make a tea. Fantastic. Or year old manure. Manure must be fully aged for cannabis top dressing. Or you can use/make a black strap mollases tea. All things would help bring your soil back. Recharge is a good microbe boost for living soils as well.

The problem with using RO beginning to end in a living soil is there is nothing for what makes the soil… well soil. Is that it’s has living microbes. Otherwise it would be dirt, afterall. Those microbes have ran out of food to process to plant food. So need some kind of food for them. Or salt nutrients and feed the plants directly. But at the cost of microbes. Since you can salt just about any microbe to death.

Agree, fill out the ticket, but I think she’s very hungry. Now the question is why? Not feeding her enough, or something preventing nutrient uptake.


If you have only been giving it water then it is probably just very hungry and is robbing nutrients from. The effected leafs. But if ya do that grow ticket the best ya can others will help you out to be sure…

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By the color of the leaves it looks like she is very hungry. I compared it to this plant I fed only once.

I concur. Plant is showing nutrient deficiencies, needs to be fed.

I’m currently treating my plant w/ 2 parts Calcium Nitrate and 1 part epsom salts. It usually takes me 2 weeks to correct N deficiency. I’m doing 1200-1500 ppm in week 5 of bloom.

It looks like its coming to its end i really dont think u have much to worry about it seems natural process