Considering all the hype recently surrounding SpaceX, Moon visits and the new Steven Spielberg film I thought it poignant to have a look in depth at space exploration and horticulture. When we talk about the future of humanity beyond Earth, the conversation is usually dominated by rockets, spacecraft, astronauts, artificial intelligence, robotics, nuclear power, mining rare gasses or minerals, engineering and the amazing dream of becoming a multi planetary species. But beneat