Here is a link that says Daffodils don't need cold treatment, but some others do in warm climates:

http://www.bulb.com/templates/dispat...?page_id=21597

All bulbs need phosphate fertilizer to make flowers. So if the soil is low, you need to enrich it. Phosphate is the middle number on fertilizer labels... 10-30-12 for example is 30 phosphate and is a high number. Some people use bone meal, but I prefer inorganic types (they don't molder or rot).
I put triple phosphate on my bulbs in fall. And use a high number fertilizer when I do that in spring. Sometimes daffs stop blooming. If you have too much nitrogen (the first number) they grow leaves but no flowers.

I bought a cheap bag of mixed daffs on sale last fall to put where the city dug up my garden across the street and they were the nicest I've ever had! I was so surprised! Sale bags usually have inferior bulbs. There is nothing like a Spring surprise! LOL