Please note:Most hyacinths grow in zones 3 to 9. They must have cold temperatures of 40° to 45°F (4° to 7°C) for at least 12 to 14 weeks. If temperatures in your area do not get this cold, you’ll need to pre-chill the bulbs in a refrigerator before planting them outdoors...
Propagation:Grape hyacinths that are forced into bloom indoors will not bloom a second time.They do produce offsets, which can be planted outdoors. If you want to keep the bulbs, allow the foliage to die back naturally, then cutit off. Store the bulbs in a cool, dry place for the sum...