Most people are surprised by the sight of plants growing out of the side of a Phytopod.  We all know that weeds and other flighty seeds can germinate and flourish in the cracks of a wall or on a rooftop. Well, many of the lettuces and greens we eat in salads these days are what we used to call weeds in the days when mass production and herbicides had hegemony.  Growing vertical is a capability of almost all plants however! The rules are that roots will grow down and shoots and leaves will…