Which condition can improve due to companion planting?

Companion planting can significantly enhance pest control in a garden or landscape setting. This practice involves growing certain plants together that have beneficial relationships, which can deter pests and attract natural predators. For instance, some plants may emit compounds that repel specific insects, while others can attract beneficial insects such as pollinators and predatory insects that feed on pests.

This method not only helps in managing pests without the need for chemical pesticides but also fosters a more diverse ecosystem, leading to healthier plants overall. While plant competition, soil erosion, and sunlight exposure may be influenced by other factors in gardening, they are not directly improved by the practice of companion planting. The primary benefit of this technique lies in its ability to create a balanced environment that enhances pest control.