The Royal Botanical Garden, built in 1845, is one of the best botanical gardens in Australia. Botanical gardens still retain some of the buildings and features of the last century, bringing together more than 10,000 kinds of exotic flowers and plants. Since its establishment, the Royal Botanical Garden has collected more than 12,000 kinds of plants and flowers from all over the world. There are all native plants and flower species in Australia, and more than 20,000 exotic plants have been cultivated. Because Melbourne has no frost in winter, almost all kinds of trees in tropical, subtropical and temperate zones can grow.