How old are the bulbs? Maybe they're getting long in the tooth and some may have either rotted or just run out of steam? Know they're supposed to be long lived but they're living things open to all kinds of variables.

Maybe an underground critter nibbled some of the bulbs even though Daffs shouldn't be bothered?

If others in cluster bloomed would imagine they were all planted at same depth unless you added soil on top of clumps irregularly in fall if you added things around them. That might make them take longer to pop up but that might not account for stringy foliage.

I have some new Daff bulbs that just didn't bloom but put up foliage. They were in same bag as others. Who knows? Now I see the wisdom of leaving the long stem on them when cutting spent blooms so I know which ones bloomed and which didn't as long as I mark them and/or while moving them to another location now check for rotted bulbs.

Without having look at bulbs it's hard to tell. I won't know about mine unless I have a look.

I haven't heard or read anywhere that feeding with something like Bulbtone will hurt them although if they're spent, rotted or seriously damaged by nibbling critters the non-bloomers won't be helped.

As you can see I don't have a "for certain" answer for you - just some guesses from my very limited knowledge.

No doubt you wanted an informed response but seems hard to know without seeing bulbs to rule out actual damage.

Hi CMK,

Below lists a lot of possible reasons why they didn't bloom.

I would leave the foliage to yellow on its own, watering as needed if it happens to get dry. After the foliage has yellowed a good bit (right digging time), I'd then dig, inspect them well, and if all looked all right, I'd plant in a different location.

It could be as simple as maybe a critter having tunneled under them, causing them to not get enough moisture. Possibly if the roots were disturbed, there could be some air pockets in the soil as well. Think?

What variety are the Daffs? They weren't forced bulbs last year were they?

Sue

Here is a link that might be useful: Daffodils Not Blooming?

Thanks guys! That link was very helpful chemocurl. It may be one of several things. We dont have any burowing rodents over here. The bulbs were just the regular packages sort from Lowes; I bought them four years ago or so. There not in big clumps, but I wont rule out that they dont have enough nutrints. I have noticed that a few of my tulips, the actual flowers, are smaller this year. Our soil is somewhat poor, so I dont think fertilizing them would hurt any. The bulbs do get enough water, and the leaves are green. It may also be that they have a desease or that they might have accidentily gotten burried with dirt. Once the foliage dies ill dig down and inspect the bulbs. If there deseased ill toss em', but if there ok ill replant them elsewhere. Thanks again!
CMK