Care for a hyacinth plant by watering it, protecting it from excessive moisture, applying compost, and cutting back flower stalks after the plants have finished flowering. Treat hyacinths as annual plants, and plant fresh bulbs every fall.
During dry spells, water the plants well to prevent them from reducing their numbers of blossoms. For container-grown plants, protect them from excessive moisture, especially during winter. To provide enough nutrients for the plant, apply compost annually.
Once the plants have stopped flowering, cut back the flower stalks close to the ground, but allow the leaves to die on their own. When the leaves begin to change color to yellowish-brown, dig up the bulbs, and keep them in a shaded and sheltered area to cure overnight before storing them for future planting.