The leaves have completely died back. Is it too late to dig up the bulbs?
This article will help you with transplanting Daffodil bulbs.
https://www.gardeningknowhow.com/ornamental/bulbs/daffodil/dividing-daffodil-bulbs.htm
I have had some daffodil bulbs in the fridge for several months in So.Calif., can OI plant them in pots now (October). Thank you
If they have experienced their cold period in the fridge for months now, they should be ready for planting now. This article should help
https://www.gardeningknowhow.com/ornamental/bulbs/daffodil/growing-daffodils-indoors-forcing-daffodils-into-bloom.htm
Planting these bulbs in the late fall, is it best to cover them with some sort of mulch like pine needles etc. or just leave them in the ground with no mulch on top of the beds?
Depending on your location, these are likely to survive. They can tolerate temperatures all the way down to zone 3. They are extremely cold tolerant. If you are still worried about them, then it would be ok to mulch them.
This link will take you to a collection of articles for more information on daffodils
My narcissus bulbs won't grow. They are about two inches tall and won't grow any taller. I have had them in a small amount of water (just touching the bottom) for almost four weeks now. How can I make them grow. They are in a sunny diffused light window sill. Thank you, Karen
Forcing bulbs indoors requires a pretreatment with cold temperatures. If you just purchased the bulbs, ask the store if pretreatment was already done. If you are forcing paperwhites, check this webpage: https://www.gardeningknowhow.com/ornamental/bulbs/paperwhites/forcingpaperwhitebulbs.
If another type of narcissus, check here: htmhttps://www.extension.umn.edu/garden/yard-garden/houseplants/forcing-bulbs-for-indoor-beauty-in-winter/
I have sold my home and want to take some bulbs with me. however they have started to emerge (daffodils, crocus and snowdrop), can I dig them up now and dry them and store them? TY, Daun
If you are able to wait until the flowers have faded, then dig up the bulbs and replant them in your new garden as soon as possible, they might survive, as explained here:
http://www.simplegiftsfarm.com/moving-flower-bulbs.html
If you can't plant them right away, I think you are better off leaving the bulbs at your old home and buying new ones to plant in the fall. They likely wouldn't survive being stored in their current state.
Not blooming
There are so many reasons why this could happen. This article will help you narrow down the reason: https://www.gardeningknowhow.com/ornamental/bulbs/daffodil/daffodils-not-blooming.htm
My daffodil bulbs have just started to come up. can I separate them now if I am careful or do I have to wait until they are done blooming?
You will want to wait until they go dormant again. Moving them now will damage the roots, and possibly kill them. This link will give you more information: https://www.gardeningknowhow.com/ornamental/bulbs/daffodil/dividing-daffodil-bulbs.htm