I’ve been starting daffodil seedlings for 10 years now. Some years better than others. I have started daffodil seeds in my greenhouse and then setting the pots outside to get rain. Other years start seeds outside. This year I added a 70 deg F heating table to my greenhouse to start seeds for my veggy garden but I put my daffodil pots on in early Feb to get a jump on the season. They sprouted much sooner. The greenhouse was fully loaded so this year so I’ve been growing some at 70 Deg F inside and others outside in the 30-50 deg F range. Others I’ve switched to the outside if they seem to be growing too fast. I’ve got sprouts of 6″ if they got that early heat and sprouts of 1″ that have spend most of their youth outdoors.
The ones growing slowly look stouter than the one that are growing fast. The 6″ sprouts are long but more spin-dally.
Has any one figured out which sprouting conditions produce flowering bulbs quicker? 
Hi Bill,
I guess that the proof will not be with the size of the foliage but with the size of the bulb after the foliage dies down. Then the number of years until flowering will complete the research. As with all daffodil hybridising the answer is not apparent until we have forgotten what the original thesis was.