Grass is a part of gardens??? Where do you live that your garden has no lawn/grass in it??? If you own a house the area around it is called a garden, and taking care of it is called gardening, what kind of house are you used to???
In America gardens are typically the tilled soil where one grows fruits, herbs, vegetables, and/or flowers. The grass is the lawn. Most houses have lawns, not everyone has the time, knowledge, or interest to have a garden.
I sort of assumed at one point that squid is American, kind of weird that taking care of one specific type of plant is somehow not considered gardening in america