Which factors are considered the main influences on plant growth?

The main influences on plant growth are light, water, temperature, and nutrients. These factors are critical for the various physiological processes that plants use to grow and thrive.

Light is essential for photosynthesis, the process by which plants convert sunlight into energy. Without adequate light, plants cannot produce enough food for themselves, hindering growth and overall health.

Water plays a crucial role in maintaining plant structure, transporting nutrients, and facilitating biochemical reactions. It is vital for processes such as transpiration, which helps regulate temperature and improves nutrient uptake.

Temperature affects the metabolic processes of plants. Each plant species has an optimal temperature range for growth, and deviations from this range can stress the plant, affecting its development and yield.

Nutrients, including macro and micronutrients, are the building blocks for plant tissues and are necessary for various biochemical processes. Insufficient or imbalanced nutrients can lead to poor growth, chlorosis, and other nutrient deficiency symptoms.

Considering these factors collectively, they significantly impact plant growth and development, making them the correct choice in the context of the question. Other options like cost, soil type, pests, and air quality, while they can influence plant health indirectly, are not considered primary factors in the same foundational sense as light, water, temperature