For private-equity giant KKR, a debut investment in Africa smells of sweetheart roses.

Afriflora is an Ethiopian company that grows about 730 million of the flowers a year for export to Europe, making it a significant player in the east African country's blossoming cut flower export industry. KKR is investing about $200 million from its $6.2 billion European fund to buy a stake in the company, according to a person familiar with the transaction.