or healthy roots and Potassium for healthy leaves and flowers. Compost also contains Calcium, which strengthens the plant, and Phosphates, which is required for the development of healthy root systems and helps the plant to make more chlorophyll. Chlorophyll is present in most plants; it is responsible for the absorption of light energy during photosynthesis.
             Chlorophyll absorbs the red and blue-violet parts of sunlight but reflects the green, thus giving plants their characteristic colour. Chlorophyll is found within chloroplasts, present in large numbers in leaves. The light energy absorbed from chlorophyll is used to convert carbon dioxide and water into sugar.
             Cotton wool is a man made material and will absorb the water quickly, although it will protect the seeds. Cotton wool has no nutrients to give the seeds strength while they are growing.
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