Orange trees bloomed recently along Orange Avenue in downtown Orlando. But the fragrant blossoms were on small trees in concrete planters, placed there for decoration. Orange County is no longer a citrus power economically, and its vegetable farms and cattle ranches have been fading away for years. Yet farming overall, thanks largely to the flower-and-foliage industry, still generates about $250 million a year in production sales in Orange County. The processing of farm products in the county from cooking potato chips and baking bread to the packaging of orange juice accounts for an estimated...

