I would put it out just as is. The shortening days and cooler weather will force the foliage to die back. Better to have it snugly in the ground than dessicating in the basement.
You may lose it if it has been in the basement for over a year. The low light levels may not have contributed enough to feeding the bulbs. But there's nothing you can do about that now.Just plant it, mulch it over AFTER a good frost, and keep your fingers crossed.

Thanks soo much for your reply!