How to grow and harvest quinoa. Growing quinoa in the arizona desert can take up to 4-5 months for harvesting. You can get about a pound of quinoa for every 10 plnats. Typically they like cooler weather. http://Twitter.com/thegreendesert http://Facebook.com/TheGreendesert http://pinterest.com/GreenDesert http://green-desert.tumblr.com/