Yellowing of leaves

Go to buildasoil.com and ask jeremy for help he will let u know what u need. They do sell products of course but also on that site are recipes for soil and u can see if ur missing anything. Alos i would absolutely add some Real Growers Recharge get an 8oz bag it will last you years. Cheers froend good luck and they look good so far great work. And remember your in soil so leaves will turn yellow always with organics. These really green plants you see on here are typically salts or just a really experienced organic grower. One more thing...soil is tge battery the bigger the battery the longer the plants go without needing to be amended. I would go at least 10 gals each or one big bed with 9 plants. U can get away with a 5 or 7 gal for sure but when u hut week 5 flower ur in troubke and having to use some nutes.

Have you heard of urine?

Nitrogen deficiency. Give them 1 feed, half strength to start and see if it keeps going. Feed every 2 or 3 watering. Water when the pots gets lightweight.

Start using a veg nutrient that has more N then P and K. Also let your soil dry a bit between feeds. You don't want it to be constantly soaked. Try and get 20% run off.

Hi. Have a look at this website: https://www.growweedeasy.com/why-cannabis-leaves-yellow Hope this helps Good luck🌱🐈

Lack of nitrogen. Start giving nutrition. Not a ton they are still small. Go with about a third of bottle recommendations.