Hi,
I wouldn’t wait this long... I’m sorry for you.
There should be something which have stunned your plants growth. If it was just one plant, we could think that it was the seed, but with the four, no.Do you put them directly in their final pot? How did you germinate them?
IMO try another batch, try biobizz lightmix soil, rootjuice like biobizz indicate and maybe the light a little bit nearer.
Good luck friend and wish you a real good first grow