LEaves yellowing and falling off in flower is normal and it will happen period. Feeding veg nutes keeps the leaves green from the nitrogen which they dont really need in flowering and can make a harsh smoke. I totally stopped veg nutes with the switch in lighting for flowering. Some strains seem to need a little veg nutes for the first few weeks of flower like Blue Dream, all 3 BD plants yellowed a lot in flower. I grew 3 BD plants, kept 1 and was vegging the other 2 for my father in law. All 3 yellowed after 2 weeks into flowering. I just let mine be and it is doing fine and has nice buds for my first grow and my father in law did everything he could to green the leaves back up again. Which he did do but he fed a lot of nitrogen to the plant to do so and I think he stressed the plants out because his yield was pretty low from 2 plants. A slow transition from veg to bloom nutes is a good idea I just done feel the need because the soil still has plenty to feed the plant. In veg I concentrate on growing green healthy plants in flower I concentrate on growing nice buds.
You should not be posting advice given your experience level.
Yellowing leaves and leaf loss during flower is
not 'normal'. It's your first grow, how do you know what 'normal' even is?
Yellowing leaves could be a sign of many things but in your case, it's probably from not meeting your plant's needs for nitrogen. Your plant is essentially suffering a slow death which means your yield and quality will be poor. 'Poor quality' is relative, it could still be better than stuff available on the black market. Compared to properly grown herb, you're producing poor quality.
Instead of feeding the plant what
you want the plant to have, try feeding the plant what it actually needs. Sometimes that means using 'grow' formula in bloom. Maintaining healthy, green leaves until the end of the plant's life is the best way to not only produce well, but to produce the best meds. Good luck!
