I am an organic grower. What I've learn from growing in recycled living soil is, you can only watch for signs of deficiencies and correct them as they show... It never affected my yields.
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Therefor, I have to disagree with everyone here. Nutrient only *support* the growth. When talking about nutrients, I mean micro and macro like N, P, K, Cal, Mag, S, Fe, molybdenum, manganese, and all the others. Not talking about natural (or synthetic) plants hormones, or the controversial PGR.
Your plants are super healthy mate. No deficiencies = No need to feed. Period.
There is a ton of reason why this plant is a dwarf beside pointing that no food was added, because, again, this plant have 0 signs of deficiencies.
Reasons for a runt plant include bad phenotype, bad genetic, stunt growth caused by off the chart VPD, wrong light and or light distance, soil temps, underwaterd container that did not promote enough space for root expansion and others that I might don't know and or don't think about.