Pond plants are essential for every pond. Water lilies and water plants are the most well-known. They add lovely colour to your pond and garden. Zones are designated for the different types of aquatic plants. Zone 1: waterside plants, zone 2: marsh plants, zone 3: water plants, zone 4: water lilies, zone 5: oxygenating plants and zone 6: floating plants. Waterside and marsh plants are the most like normal garden plants. Some can also grow in full soil, if they are always kept moist. Water plants, water lilies and oxygenating aquatic plants are always planted under water. Floating plants, as the term suggests, float on the water and use their roots to extract nutrients from the water.