IF YOU PURCHASED THEM THIS WINTER AND THEY HAVE FINISHED BLOOMING, THEN IT IS NATURAL FOR THE FOLIAGE TO DIE BACK. I WOULD WAIT UNTIL THE WEATHER IS WARMER, PAST THE FROST DATE, TO PLANT THESE OUTSIDE. AS THEY DIE BACK, DON'T OVERWATER THEM AS THEY MAY ROT BUT DON'T LET THEM COMPLETELY DRY OUT IN THE HEAT OF THE HOUSE EITHER. IT MAY TAKE THEM A COUPLE YEARS TO REBLOOM, AND THE TULIP MAY NOT DO WELL; TULIPS ARE TRICKY HERE, NOT LIKING OUR HEAT OR HEAVY SOILS. IF THE RODENTS DON'T EAT THE BULBS THE HYACINTH SHOULD RECOVER AND LIVE FOR YEARS OUTSIDE. I HAVE SEVERAL THAT ARE OVER 10 YEARS OLD.

WELCOME TO THE FORUM, CLASSYCAT! I WANT TO MENTION YOU PROBABLY SHOULD WEAR GLOVES WHEN HANDLING THE BULBS, ESPECIALLY THE HYACINTH. I HAD AN UNFORTUNATE ALLERGIC REACTION AFTER HANDLING SOME FORCED HYACINTHS BULBS THAT WERE IN A GLASS VASE AND MANAGED TO TOUCH MY FOREHEAD AND THEN I BROKE OUT IN HIVES ON MY FACE FOR SEVERAL HOURS. HAVE NEVER HAD THAT HAPPEN WITH ANOTHER TYPE OF BULB, AND I AM USUALLY A BARE-HANDED GARDENER.