The deserts of the American southwest will bloom, in time, as rainfall patterns will change after the pole shift. But as we have explained for the deserts of Mexico, for the Chihuahua desert, this will take time. It can take decades for humus and bacteria to accumulate to the extent that plant life flourishes. But in Arizona and New Mexico and southern California, the mountain or hill country will do well. These are not desert regions today, but have soil and forests. Rainfall will increase, and the variety of plants that find make these hills home will proliferate as it does so.
ZetaTalk June 25, 2011