David, I think the ismene in your photo is not 'Sulfur Queen'. Note that the flowers of your plants seem to have five divisions. I think this is an old clone of Ismene narcissiflora which was widely distributed in the trade in the past. Here's what I grow as 'Sulfur Queen': http://jimmckenney.com/peruvian_daffodil.htm Try it, I bet you'll like it. Jim McKenney