I used standard sowing substrate from the garden centre.
I soaked the seeds for at least 2 days in lukewarm water. I then sowed them and kept them in high humidity under a grow light. I kept them moist at all times via bottom watering (capillary mat).
NOTE: this plants needs a lot of light and warmth, so sow it in spring. Chances are you'll lose it when winter comes, due to too little light.
These seeds come from Onszaden
I sowed 5 seeds. Two germinated quickly (in about a week), another one germinated a few weeks later.
Bought at Onszaden
Seeds
Seedlings
Seedlings
Seedlings are growing rapidly and you can already see the typical leaves!
The plant now has the larger, slower moving leaves as well as the smaller, faster moving leaves. Time for a time lapse!