World Flower Garden World Flower Garden is located in the Fengtai District with a total area of 41.8 hectares. It is the largest Botanical garden within the fourth ring road of Beijing. It owns the largest plant greenhouse in Beijing, too. There are seven greenhouse scenery areas in the garden. The temperature, humility and irrigation are controlled by computer which creates the most favorable environment for the plants. Every greenhouse displays many unique and beautiful flowers home and abroad. The outside scenery of the world Flower Garden consists of fifteen garden squares.