May Flowers White house article:
https://www.whitehouse.gov/articles/may-flowers-bloom-closer-look-white-house-gardens-past-present/
https://www.politico.com/story/2016/10/michelle-obama-garden-changes-white-house-229204
"On Wednesday afternoon, Obama unveiled a much bigger version of the garden, which uses cement, stone and steel to make it a more permanent fixture on the South Lawn. The updates are seen not just as preserving Obama’s garden — recognized globally as a symbol of local food — but also as a way to dissuade, say, a President Donald Trump from scrapping it…"
What's under the cement and steel?
Cement and steel are not very pleasant or natural garden materials…