Nymphaea Aurora - Water Lily

Hardy water lilies can withstand winter if the pond is at least 50 cm (20in) deep. They should be planted from March to June at a depth of 30 to 80 cm (12 to 32in), except for dwarf water lilies, for which 20 cm (8in) will be enough, and small rhizomes, which should initially be submerged only 10 cm (4in) deep, gradually moved deeper as the plants grow. Plant the rhizomes in good, stone-free garden soil (never use potting soil, as it is too rich and promotes algae growth) in the sunniest spot in the pond. Space each rhizome at least 1.50 m (5ft) apart and plant them in the soil up to the collar. In a natural water feature (pond or lake), make sure the water level remains fairly stable and that the water is neither too acidic nor too alkaline (desired pH between 6.5 and 7.5). Rhizomes can be planted in a wicker basket or a fine wire mesh basket that can be sunk into the desired location. For classic hardy water lilies, use a pot with a diameter of 40 cm (16in) (wider than it is tall). For shallow ponds, planting in a bowl is possible, but you will need to overwinter the rhizomes in damp sand, protected from frost. If the bottom is muddy, simply attach a stone to the rhizome and throw the whole thing into the desired location. Never leave Nymphaea rhizomes exposed to the sun or air which will dry them out; plant them upon receipt or purchase. If you have fish in your pond, spread a thick layer of large gravel on the surface of the planted pot to discourage them from digging into the soil and dirtying the water. Water lilies will develop best if they are planted in containers suitable for their growth. Water lilies are nutrient-demanding plants, so distribute balanced slow-release fertilizer when planting and at the beginning of each growing season (e.g., Osmocote 10-11-18-2 with a 5-6 month duration). During the summer, remove excessive leaves from the centre of the clump, leaving only the most vigorous ones. Also remove yellowed or stained leaves, and emergent roots.