i started drinking the tea at almost 37 weeks, i was so ready to have her, but i wanted to wait til it was safe to have her, and anywher from 37 weeks is good
i had her at 38 weeks,
i too believe the tea helped my body prepare, i def recommend it, and i will def be using it again next time.

If i were you id wait til he's home, or even a day or 2 before, just to be on the safe side since u have no other support persons.