Adenium obesum
Adenium obesum Black Steel, known as desert rose, a caudex plant with completely black flowers - a real rarity.
Sowing takes place in plastic pots. Either commercially available mineral-based cat litter, pearlite or pumice gravel is used as the substrate. Spread the seeds evenly on the substrate. Cover larger seeds thinly with substrate, fine seeds can remain on the surface.

Then place the plastic pot in a zip-lock bag -  pot size of 6 cm, a zip-lock bag size 120 x 170 mm is recommended. Pour enough tap water with a few drops of universal fertilizer into the zip-lock bag so that a few mm of water remain visible after the substrate has absorbed what it needs needs.

Location: on the window sill or in a mini greenhouse in partial shade, during the day the temperatures should be around 23 - 28 C, at night a little lower at 20 - 22 C. 
Price is for 3 seeds