What is the rule of 3 in gardening?
In gardening, it might be three containers or three evergreens next to each other. The rule of threes is a design principle that suggests planting in groups of three creates a natural, balanced, and visually appealing look. Three plants creates balance Though three can be tricky in human relationships, this number fits expertly in a landscape. The trick is in the arrangement. Three plants in a row is dull because you know what to expect. If you have enough space, group them in an equilateral triangle.