To prepare for wine, have at hand a good, clean stone crock or Pyrex container, because you will be pouring boiling water over the blossoms. See to it that there are no spiders or bugs in them. Drop the blossoms into the crock and pour the boiling water over. If using the orange, add it. Cover with a clean white napkin and let stand for 3 days in the kitchen out of the way where it's not too cold.
Dandelions come in early spring and for good fermentation warmth is needed.
Strain through a thin, clean, odor-free cloth into a clean glass jar. Add the sugar and stir until the sugar dissolves. Cover again with a clean cloth and leave in the kitchen in a warm, draft-free place for 3 weeks. Then strain into clean, dry jars, filling up to the top. Tie a clean cloth over the mouth of each jar and leave in the same place to finish fermenting, which will take about 4 months, or until the wine stops being effervescent.