During an on-site visit, which factor is NOT relevant to consider?

When conducting an on-site visit for horticultural purposes, it is essential to assess various environmental factors that can significantly impact planting and landscaping decisions. The relevance of each factor hinges on its influence on plant health and the overall success of horticultural practices.

The type of soil is crucial because it determines nutrient availability, drainage, and the root growth potential of plants. Soil types can vary significantly in composition and qualities, such as pH and organic matter, all of which directly affect plant selection and care.

Drainage conditions are also vital since water management is a key element in horticulture. Poor drainage can lead to waterlogging and root rot, while excessive drainage can cause drought stress. Understanding the site's drainage helps in planning how to manage watering and irrigation systems effectively.

The location of underground utilities cannot be overlooked either. Knowing where utilities like gas, water, and electricity lines are situated is essential for safety and planning. It helps avoid damaging these utilities during planting or landscaping, which can lead to significant safety hazards and costly repairs.

While cleanliness is an important aspect of maintaining a professional and safe working environment, it does not directly impact the horticultural practices or decisions related to soil, drainage, or utility management. Therefore, in the context of factors that significantly influence hortic