PRETORIA, South Africa — 2018 has been called the “year for cannabis” in South Africa. But there are still hurdles before a legal marijuana industry can flourish in an African economic power deemed ideal for large-scale cultivation.

Advocates rejoiced at a Constitutional Court decision in September that upheld the legalization of the adult use and cultivation of pot in private. A cannabis expo in the capital, Pretoria, this month was Africa’s first, organizers said. However, buying and selling cannabis for recreational reasons remains illegal, and an onerous licensing process has held up the cultivation and sale of medical marijuana.