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Looks like you have at least phosphorus (reddish stems / veins everywhere) + nitrogen (bottom leaves yellowing and dying) deficiencies, if not other deficiencies as well. Measuring PH is a must, as it affects the uptake of all nutrients. You need to follow <span class="link_user">@Horticulturehobbyists</span> advice, otherwise these plants aren&#039;t going to survive. If you are trying to avoid buying fertilizers, you can try experimenting with getting phosphorus from sources like boiling banana peels or nitrogen from diluted piss (https://www.royalqueenseeds.com/blog-how-and-why-to-create-homemade-organic-fertilizers-n764). Results will obviously be far less predictable though than with nutrients which have recommended dosages.

<span class="link_user">@Eryan</span>, Thanks for your advice. I&#039;m not trying to avoid fertilizers, I just want my grow to be as organic as possible. I couldn&#039;t find any organic fertilizers when I started this growth so I had to go with manure that had NPK of 3,5/2/1,5. I have found some organic fertilizers by BioBizz that are in my budget for the next grow and flo of this grow so I will be switching to them very soon. Manure isn&#039;t really good as I found out. Also, the soil I used isn&#039;t really good for weed as well. However, I think that the plant was nutrient deficient because it was overwatered for so long. I had small leaves with weird colours for a long time and I thought that it was normal, but from the time I stopped watering I see very large and nice green leaves and stems, you can see that in the photo. But I much appreciate your comment. Thank you and good luck with your growing :)