What Should I add?

you're not bad at it buddy. for the next cultivation, I would advise planting the plant in a smaller pot. 1 liter for example. and after 2-3 weeks, transplant into a larger pot. this will help the roots to better master the pot and, accordingly, the plant will be strong, large and healthy. I always transplant plants 2 times. even autoflowering. I start growing in 0.4 liters of pots, then I transplant into 1 liter and then at 8-10.