cut flowers not opening?

Googling "cut daffodils not opening" brought up this:

Ideally you will recut every day or two under water to keep the vascular system open. Sometimes the daffodils will not have been properly stored or shipped and they don't open. Other flowers shouldn't be arranged with cut daffodils as they have a gummy substance that clogs the vascular system of other plant material

I think I read somewhere that flowers should be kept in a dark place when first brought home. I can't remember if this applied to daffs and tulips.

Sorry to hear about this - a sad waste of money.

This has happened for me with daffodils a few times this year. I now try to buy those which are partially open already.

Sounds like they were frosted in transit. Daffodils don’t mind the frost and snow whilst in the ground, but might not have been kept in the right conditions when in transit.
I’ve had this with roses before.