Pachypodium brevicaule is a very nice and wanted Pachypodium species from Madagascar. It is on of the smaller species of the family. Give it a good mineral soil with plenty of warmth. Be carefull not to overwater Pachypodium brevicaule. Do not water when it is not actively growing in rest.
Please take note that many seeds, especially these seeds need a treatment with desinfectant to prevent any mold during germination. This can declare a difference between 0% germination and around 80% when the seed skin is desinfected.