I was just told to not put cut daffodils in the vase with other flowers. Is that true, and why not?
Yes it is true – cut daffodils can secrete a substance in the water which can shorten the lives of the other flowers. So when using cut daffodils, place them in a vase for a day by themselves, and then put them with other flowers, or simply keep them in a vase all their own.