Effect of water hardness on seed germination
Watering plants with soft water will help seeds germinate more quickly
Water and plant growth
Seeds need water, oxygen and the correct temperature before they can start to germinate and grow. After the seeds have germinated, they will also require light and carbon dioxide for photosynthesis. Plants will normally die if they are deprived of water and oxygen. The amount of water supplied to the plant or seed is also important. Too much water will cause the roots to be covered with water and deprive them of oxygen. This can cause the root to rot and kill the plant.
The water that we obtain from the tap or other sources is normally not pure. There will be some minerals or divalent salts in the water. The most common is calcium, magnesium and iron. The amount of calcium and magnesium present in the water will determine the hardness of the water.
The hardness of the water can be reduced by using water softeners. Water softeners help to reduce the amount of calcium and magnesium that is dissolved in the water. Sodium carbonate is an example of a water softener that is commonly used. Water softening takes place by ion exchange where the sodium ions and calcium, or magnesium ions, will "exchange" places.
Basic safety requirements