Good morning to all!
When I saw the post asking about Isabelle Rose I could not help but respond as it is one of my all time favorite plants since the first time I saw it blooming in Ellen's garden. I don't know if I can say much negative about this daylily. It's hardy with no mulch in zone 5. It stands up straight and tall even when loaded with blooms. In my garden is stands about 4 1/2 feet tall. It is both pollen and pod fertile and I have been using it quite a bit in doing a little hybridizing. If you go over to the 2014 seedlings you can see some of my results with using Isabelle Rose. It makes a lovely clump and is stunning when in full bloom. Every flower opens well. This flower will always be in my garden!