After there where some small roots visible on the ground of the small pots, the plants got placed in the final 8l fabric pots. The soil was some flower soil from a local hardware store with a pH of 6.2. I mixed around 25 liters of soil with 50g of Green House BioBloom nutrients and put around 1,5l of moisture in it one night before using the soil for replanting.
The Plants did very well in the new soil and showed no signs of stress.