Water is essential for all plants. Drought, or lack of water, will stress plants and eventually kill them.
Plants need water for cell chemistry and use it to transport food and nutrients and to keep cool. Drought causes wilting as turgor falls, overheating, lack of food and nutrient and eventual death.
It seems obvious that to avoid stressing your plants with lack of water that you should water them regularly. However, different plants need different amounts of water. Deep rooting plants will be better able to find water and plants that have evolved to cope with drought will be better able to survive periods of drought. Some plants 'prefer' to have less water and over watering can also encourage disease, cause plants stress and death. It is therefore important to water plants to a level appropriate to that plant.
Soil type is important for water retention.
Already know what you want?
Find your closest retailer.