Quote:
"Provide a thorough watering at the time of planting. Water every two or three days after that. Be careful not to overdo it, but keep the soil moist. Seed should sprout within 3 to 4 weeks".
Longer is usual for them!.
I remember growing one in a large planter, some years ago and when I decided to dig it out, I discovered it had produced a huge fleshy root, taking up most of the pot.