Season to season there can be quite a bit of variance in terms of when plants bloom. Since I take a lot of photos, I was able to look through some past years and find this example which confirmed my suspicions that some plants are indeed blooming later this year.
Narcissus 'Minnow' on March 16, 2005; in its full glory.
The same bulb this year. Photo taken today March 10, 2009; buds are barely beginning to show. There's no way it'll make it to the stage of the upper photo in the next six days.
