2May20100 /kathy wash 2012/0/original blog02 May 2010 They really are growing on top of a stack of nonfunctional inner tubes–no dirt, just old tubes. Share this: Share on Facebook (Opens in new window) Facebook Share on Pinterest (Opens in new window) Pinterest Share on X (Opens in new window) X Share on Tumblr (Opens in new window) Tumblr Email a link to a friend (Opens in new window) Email Print (Opens in new window) Print Related