The article says indoors the first year. I have never tried to grow a daffodil from seed but I can't see why you would want to keep them indoors for a year. I also suspect they need cold stratification to germinate.
As you are growing from seed, your daffodils will not look like their parents. And some hybrids don't produce viable seed.
If this is an adventure/experiment, go for it. If you are trying to increase your daffodil population, let them set bulblets. The maturing seed pods are stealing nutrients from a bulb that needs every ounce of energy to feed itself for its long fall/winter nap.
Daisy
