i have some real seeds i bought some of the herb in a bag about a year ago and in the flowers they had 4 tiny seeds so i took all the seeds out. i planted 5 of them and 3 grew one got really really tall. they all died because once they get big enough they dont use hardly any water and i kept watering them so they died.
i would recommend planting them in sand
i still have some seeds let and i planted some only one sprouted but i am willing to trade them all if someone is interesting im sure a few will sprout i have maybe around 20-30 left
should get maybe 10-15 at the most out of it
maybe as little as 8. i am guessing.
if need be i can plant some more and take pics to see if they sprout.
pm me if your interested.