The condition of a plant having sufficient water within its tissues to support growth, nutrient transport, photosynthesis, and overall plant function.
Plants depend on water for nearly every biological process. Water absorbed by the roots moves through the plant, carrying nutrients, maintaining cell pressure, and helping regulate temperature.
When a plant is properly hydrated, leaves remain firm, stems stay upright, and growth continues normally. When water becomes limited, plants lose internal pressure, causing leaves and stems to droop or wilt.
Hydration depends not only on watering but also on healthy roots, adequate soil moisture, and the plant's ability to move water throughout its tissues.
Proper hydration is essential for plant growth, productivity, and survival. Understanding plant hydration helps gardeners distinguish between true drought stress and other problems that can cause wilting, such as root damage, poor drainage, or disease.