Darker Tones Recede
The contrary goes for dark as opposed to soft or pale hues. Darker tones recede, providing the trick of deepness. While mild tones give the sense of a lesser amount of interesting depth, making you feel that you are closer. That doesn't just do with plants, you can easily decorate a distant wall surface with a darker tint or position a dark-colored piece towards the back, it'll mislead you in to imagining it truly is further back plus the back garden would appear to be larger than it is.
