Water regularly during the active growing season in spring, ensuring the soil remains consistently moist but not waterlogged. Reduce watering significantly as the foliage begins to yellow and die back in late spring or early summer, as the bulbs enter dormancy and prefer dry conditions. Avoid overwatering, which can lead to bulb rot.

No significant pruning is required. Allow the foliage to die back naturally after flowering, as this process replenishes the bulb's energy for the following year. Deadhead spent flower stalks if desired to prevent self-seeding, but this is not essential for plant health.

Muscari neglectum is easily propagated by dividing offsets from mature clumps during late summer or early autumn when the bulbs are dormant. Carefully separate the smaller bulblets from the parent bulb and replant them immediately at the same depth. They also readily self-seed, forming new plants around the parent.

Repotting is generally not necessary for garden-planted grape-hyacinths. For container-grown plants, repot every 3-4 years or when the pot becomes overcrowded with bulbs. This is best done during the dormant period in late summer or early autumn, using fresh, well-draining potting mix.