Nymphaea alba requires consistent immersion in water. The rhizome should be submerged by 10-30 cm of water, with the leaves floating on the surface.

Maintain a stable water level, especially during warmer months, to prevent the plant from drying out and to ensure optimal growth.

Prune Nymphaea alba by removing spent flowers and yellowing or dead leaves. Cut these back at the base of the stem, close to the rhizome.

This encourages continuous blooming and maintains the plant's aesthetic appeal and health. Regular deadheading also prevents seed formation.

Nymphaea alba is typically propagated by dividing its rhizomes in late winter or early spring. Carefully separate sections of the rhizome, ensuring each piece has at least one growing point and sufficient stored energy.

Replant these divisions in suitable containers in water.

Repot Nymphaea alba every 2-3 years, ideally in early spring before new growth begins. Use a large, heavy pot (at least 30-40 cm in diameter) filled with a heavy, loam-based compost.

This provides adequate space for the rhizome to expand and anchor itself.