Each roots were about 2-4 cm long. Quite crazy result on the germination tbh. This amazing start tremendously helped the grow of the seeds to reach the plant stage.
As they grew I added some more grass to the buckets and I added a humidifier to push humidity to its maximum.
I poured about 30cl of water 6.5 - same thing for the humidifier.
At this stage, I am confident that they are all healthy but we all know how still fragile they are at this stage.