How popular has organic gardening become?

Reference to proliferating practitioners, products and sellers in Asia, Australia, Europe and North American can be considered an indication of how popular Organic Gardening has become. A precise answer requires current statistics from such countries as Australia, Canada and the United States, China and India, England and Wales, and in Italy and Spain. In the way of an example, the U.S. Department of Agriculture website states, in an article updated Thursday, June 2, 2016, that the United States has more than 31,000 organic-certified businesses, farms and ranches that account for a $43 billion organic retail market.