They are borderline hardy in zone 8. People are successful in growing them in your zone, with special attention paid to winter temps. You can certainly try planting them in a sheltered location, near a south or west facing wall, which will radiate some heat at night in the winter. Mulch in the winter, use a frost blanket if frost is expected. Another way is to plant them in a good sized pot, sink the pot up to the rim in the ground. That's insurance in case of a severe, long subfreezing spell. Worse case, pull up the pot, and bring it into the garage until it warms up. Moisture in the winter is as much of a danger as the cold. Beware of rain runoff from the roof and lawn irrigation during midwinter which may keep the bulbs too wet, promoting rot.
