The plants are close together. What is the purpose of this closeness

The purpose of planting plants close together is to create a dense and lush appearance, as well as to maximize space and optimize light exposure. This can also help control weeds and prevent soil erosion by creating a tight canopy that prevents sunlight from reaching the ground, reducing the chances for weeds to grow. Additionally, planting plants closely together can provide natural shade and humidity, making it easier for the plants to retain moisture and thrive.