142.For commercial purposes gardening is chiefly practised by market-gardeners, who also grow flowers, act as orchardists, and often make wine. There are hardly any nurseries for trees and shrubs in Italy, if we except those principally for orange trees at Genoa, Leghorn, and Nervi, and two small ones for general purposes at Milan. Those who form new gardens are chiefly supplied from France, or from their friends, or from the proprietors of private gardens; most of whom sell whatever they have to spare.