I've never heard of what you are talking about.
Wabi-sabi is an aesthetic that focuses on the transient nature of things, and wabi- kusa Is sort of like a water dish garden with plants growing on a ball of substrate wrapped in moss.
[censored][censored][censored][censored]akusa is a complementary planting that goes next to bonsai.
Wasabi is a condiment best enjoyed on sushi.
One square inch of plants isn't really anything.... It's just a square inch of plants.