I bought this daylily about 5-6 years ago. It never blooms a lot, but I do love it. Problem is, it appears to be getting smaller every year. It's in a flower bed where other things are flourishing fine, including peonies. It gets a bit of store bought manure added to the topsoil every year. I use Miracle Grow feeder for all my plants. I don't let the dying flowers stay on the plant too long.
What can I do to help this daylily??