Yellow leaves who die off...

Hola amigo! Controlas el ph ??. Si el ph no esta en los valores óptimos, tal vez la planta presente hojas amarillas que con el tiempo se van cayendo. Los tallos de las mismas tienen un color purpura, síntoma de que hay una deficiencia.

She’s just hungry

Yep, lack of nutrients. She is cannabilizing herself due to a lack of nutrition. That is, taking goodness from the older leaves to feed the growing parts and this is why the older leaves are dying. Increase you feeding slightly, but don't over do it and don't try to fix it all at once. Gently does it.........

Yup. A diary helps. But, overall it looks like core NPK issues. As its early in the stages. So, more often than not. It's NPK def. Up your feed. Can't c what u giving so. Anyways, good luck.

Need more pictures of the stems and dairy