So my leaves have started turning yellow and falli...

A few weeks ago it had already been showing pale yellow leaves due to lack of soil nitrogen, necrosis and some colors may be caused by a small pot in this case without a good alteration of the organic soil, whose seriously NPK option for cannabis with light performance and even few transplant to larger pots with fresh soil and some natural elements such as umus, bokashi, bone meal, dung as well and possible light without expensive nutrients, as the problem got worse advise a spray via leaflet with NPK liquid at half strength, and gradually seeing its performance, a mixture of some organic compounds around the soil would make all the difference and are not expensive.