Leave it in the vase. Give it balanced (not strong light) keep the water to the lower middle of the bulb until after it blooms (add no more water then), and let the foliage fade away. There is no guarantee that it will bloom again, but you can cut off the dead foliage and plant the bulb about 6 inches deep and see what, if anything, happens next spring. BTW, if you do not live in an area that experiences winter, nothing will happen; hyacinths need a cold spell to bloom. So it’s best to enjoy it now…and buy a new plant when it passes.
Leave it in the vase. Give it balanced (not strong light) keep the water to the lower middle of the bulb until after it blooms (add no more water then), and let the foliage fade away. There is no guarantee that it will bloom again, but you can cut off the dead foliage and plant the bulb about 6 inches deep and see what, if anything, happens next spring. BTW, if you do not live in an area that experiences winter, nothing will happen; hyacinths need a cold spell to bloom. So it’s best to enjoy it now…and buy a new plant when it passes.