I grow upward of a hundred lilies in my garden, in pots and in the ground. Some of these are over 20 years old and flower just as well now as they have ever done.
Monty did say he throws out some types of tulip bulbs as they rarely come back well, I wonder if this has been misheard or misinterpreted? Lilies are expensive, and certainly would not be replaced each year.
I do not water mine with fertiliser all spring, they get a dose of chicken manure, the pelleted organic kind, annually, around April, and that's about it. I do wonder if these are being over watered, they really don't mind a dry time. Some of ours have frozen solid over the years, and have merrily gone on flowering afterwards - they are tough things and don't need coddling. They certainly never get lifted, just growing through the massed planting that is around them. Their only enemies are the dreaded lily beetle, upon which we wage persistent war, and lily virus. This gives streaky leaves, and distorted buds, only cure is burning the bulbs and the stems.
our lilies are now busily making buds profusely, and will be a mass of flowers in a few weeks time - there are some for sale in flower now but they have been brought on in glasshouses - the outdoor ones will have to wait awhile. They are never taken out of their pots, the pots are tucked near the hedge or beside the greenhouse or house wall in the winter and that's about all the protection they ever get.