Could your bulbs be planted in an area with poor drainage? (Daffodils love water but must have good drainage). They do not do well where the water puddles. They could be victims of "basal rot" fungus or other disease and die out. Plants infected with basal rot have green color loss on the leaves, malformed leaves, stems, and flowers - or all of the aforementioned. Basal rot is incurable - dig and discard the bulbs.

Amend your soil to make it friable and well draining. Then, replant a new bunch of daffs. Most are only good for five years or so without dividing anyway.

I'd throw those out at your earliest convenience. You can go to the big box stores, Van Engelen bulbs or Costco for pretty cheap daffs. Costco has had 50 count burlap bags of King Alfred type large yellow daffs for less than $20 the last few years so you could just try those for a minimal investment. They won't be afflicted the first year - and you definitely should not plant the new bulbs in the same places as the old ones. Its always a shame to have to get rid of an old plant friend but when they are diseased like that there isn't much point in keeping them.

A lot of daffs are so hardy I've had bulbs that got dug up by critters and laid on top of the soil all winter and still bloomed laying sideways in the spring. So you might try planting them up a little bit higher if your drainage is poor. Or you could try calling John Scheepers, Van Engelen or Old House Gardens to ask if they can recommend a disease resistant variety. But I've never heard of daffs even getting anything they are so tough. So clear out the old stuff and try something new.

Thank you both- I'm rather young, only seventeen, so seeing all these daffodils I've grown up with start looking unwell after years of being fine, I just started to worry about them- but I guess it's time, I don't want whatever is affecting them to spread to nearby properties, it's awful looking!

I'll dig them up when they start showing foliage again, I can wait another season before buying I guess.

Thanks again, I really appreciate it!

Before you start digging them up, another possibility is that the green tattered blooms are normal. It might be that the daffs you remember were crowded out by a double daff such as 'van sion'. It normally has greenish tattered blooms that come from fat swollen buds that tend not to open if the weather is not to their liking (too hot, too dry). (it might not exactly be this type, but they kind of look alike)

My brother used to have a ton of nice daffs when he first bought his house... now he has a ton of these yucky weedy ones that only occasionally open a flower. They multiply so fast that they are overcrowded within two or so years and the other nicer daffs seem to get overwhelmed.

-Just another idea. I hope it's not a disease and if it was a drainage issue they probably would have died out completely over the years.

i am more inclined to believe it's herbicide damage. Do you have a lawn spraying service? Could they be a little careless?
Linda C