ARUSHA, June 5 -- DID you know that Arusha is more than just a launchpad to Serengeti safaris and Mount Kilimanjaro selfies? This region, tucked in the shadow of volcanic peaks and buzzing with entrepreneurial spirit, might just be Tanzanias most underrated investment gem, and no, we are not being dramatic.

From agriculture and tourism to renewable energy and carbon trading, Arusha is waving a giant green flag to both local innovators and foreign investors. And its not just waving, it is dancing with it.

Take the horticulture sector, for instance. With a temperate climate and fertile volcanic soils, Arusha grows everything from avocados to roses that end up on European breakfast tables and wedding aisles.

The Tengeru Horticultural Rese...