1St grow issues - American Cookies

It looks like your plant is definitely struggling, but you’re not far off. The yellowing from the bottom and the slow growth point to a nutrient issue, most likely nitrogen deficiency or generally too light feeding, especially since you’re using inert soil. In that setup, the plant fully depends on what you give her, so if the nutrients are off, growth will stall like this. I would slightly increase your nutrient strength and make sure your pH is in range, otherwise she won’t be able to take anything up properly. Also check your watering habits, don’t keep the soil too wet all the time. One more thing that might really help you: I actually use the exact same light for seedlings. I’ve noticed the same issue once plants get bigger. I can’t say it for sure, but I suspect the spectrum isn’t ideal for later growth stages. When I use my main grow light from the start, I don’t have this problem. Also, what’s your relative humidity like? Could it be that the plant is getting too much direct moisture from the humidifier? If the leaves are constantly hit by condensation, that can also stress the plant. Maybe that helps you. Stay True! 😊

Hey I checked out your profile, but there’s no info about your grow. For a good grow, the main things to pay attention to are: The pH should stay around 6.3 in soil for nutrient absorption. The environment: Heat around 24 degrees. Most plants don’t like intense heat. Humidity around 55% to 60% continuously works very well. The second important thing is to know your nutrients well. I struggled a lot in the beginning, which is why I found simple nutrients to use without any hassle. For production, the more tops the better; that’s LST and defoliation. I don’t claim to be a master, but my results are consistent. Those are the only tips I can give you based on your photos. I wish you good luck! Feel free to check out my diaries.

More nutrients, expecially more nitrogen. Check pH and feed your plants😉

Plant needs more N... an in general more feeding. Inert soil is more like Coco or Hydro. Change nutrients to a hydro brand or at least feeding plan.

Yes, plant is underfed and starving. At 10 weeks of age, you should have a tree by now, not a dwarf seedling! An N/P/K ratio (it seems) of 2/2/3 is nowhere near what cannabis requires. Something along the lines of 7/5/9 would be more suitable. Find a better fertilizer brand..............look at Canna or B.A.C, they have been making cannabis nutrients for decades already. Starting again with the proper nutrition may be your best option.

For one reason or another the plant isnt getting the correct nutrition.The soil doesnt look too wet.Its not drying too much is it?Soil needs to be kept wetter than coco.Most people on here were giving everyone the same advice which was for coco..Weight is a good way to judge it.Check it out but I think with soil it wants watering whhen 2/3rds of the weight is gone,google it.Like I said those bottles look old and they have a short shelf life so the least Id do is check the PH yourself.If you don't have a pen then get one.Google it.Its the oldest leaves that are worst effected which suggest its lack of nutrition.They arent available/PH or they arent there.The root feed looks like its just seaweed/kelp.I don't speak spanish but I guess Alga Marinha is one form or another of kelp which I love,Im always bangin on about so keep that up.How old are the bottles and how have they been kept.I guess youll be feeding it a specific bloom feed when it flowers as it needs that and more.

inert? so soilless? Read guides and articles on cocoforcannabis.com -- "coco coir" or not is irrelevant to growing in soilless. Amend irrigation practices.

Looks certainly stunted/suffering from lockout. What's your temp/humidity/water ph? I'd repot it in a bigger pot with a known quality soil (like plagron batmix or similar) as a first step.

Are they auto plants? You don't specify. It seems to me that you have a strong deficiency of calcium and magnesium that's blocking nitrogen absorption. If you're using coco, you might want to water more abundantly to prevent the substrate from becoming saturated with mineral salts. Although I think you can solve it with calcium and magnesium, it's important to know how to apply it. If you want, message me privately and we can go over it.

Nitrogen deficiency