When can the sowing definitely go outside? It's now 5 cm. The first 2 serrated leaves are visible but still very small.

I usually only put the plant outside permanently when it has developed several nodes and has leaves with 5 fingers. By that time, the roots are stronger and better developed. During the germination phase, I recommend keeping the humidity above 75%. Also, make sure the plant gets at least 18 hours of light so it doesn't enter the flowering stage too early. I'm also involved in genetic crosses and breeding. Feel free to check out my page; you might find something useful. 💚🙏👽