Haven't uploaded week 8 so here's a few words about then. I couldn't do much else since I was waiting for some supplies before transplanting them.
Overall, it was interesting to learn more about watering. I was definitely underwatering them and I think that contributed for them looking "sad" on week 7. After increasing the amount of water, they started looking better and growing more too. I also sprayed them with bauv. for IPM.
About week 9:
Supplies arrived so I mixed some Bokashi in the soil mix, filled some 7L vases (made some extra holes on sides, lesson learned from the first weeks hahaha) and transplanted the plants. After that, I watered them some Shrimp FPE to increase microbial life, phosphorus and chitin content in the soil.
2 days later and two of them are looking really happy ( plant 1 and 3)