I hope that day will never come if I have to choose ONLY ONE daylily! That will be a very sad day indeed! Can't do it! Having said that, my number one daylily this year is Jolly Good Yellow because it just blooms and blooms and then reblooms.
Here is a pic of it taken today at 5PM. Still looking good at this time of the day. Did not get to see it this morning (was at work) but it probably looked just as good then.
