Plants need several essential things to grow well, including:Water (like rainwater) - Crucial for photosynthesis, nutrient transport, and cell structure.Sunlight - Provides energy for photosynthesis.Air (Carbon dioxide and oxygen) - Carbon dioxide is needed for photosynthesis; oxygen for respiration.Nutrients from soil - Important elements include nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur among others.Proper temperature and environment - Suitable conditions for growth and development.Water is vital because it forms 80-90% of a plant's fresh weight and is used in many physiological processes essential for growth.