Water regularly during the growing season, keeping the soil consistently moist but not waterlogged.

Reduce watering significantly once the foliage begins to yellow and die back, allowing the bulbs to dry out during their dormant period. Ensure good drainage to prevent bulb rot.

After flowering, deadhead spent blooms to prevent seed formation, which diverts energy from the bulb. Allow the foliage to naturally yellow and wither before removing it.

This is crucial for the plant to store energy for the next growing season.

Divide crowded clumps of bulbs in late summer or early autumn when they are dormant. Replant the divisions immediately at the appropriate depth, ensuring they have good drainage.

This method also helps rejuvenate the planting.

Repot Narcissus assoanus every 3-5 years, or when bulbs become overcrowded, typically in late summer or early autumn before new growth begins. Use a well-draining potting mix and ensure the new pot is only slightly larger than the previous one.