You can't wait until you see them to put the feeders out. Just the opposite. Once the heat of summer is really starting to weigh down on backyard life, that's when you just get that feel that they're probably already around. You won't see them just sitting around waiting for the bright red feeders to appear. They've got to be coaxed to come. The sightings and reports from this year show that they were in our area as early as the first week of April.
Recipe for artificial nectar (syrup):