In three years, there should have been some increase. Perhaps the cultivars you bought are not the best for your climate. Of course, some cultivars are slow multipliers. Without more information (assuming you don't know names) about growing conditions, one cannot say more.

Have you tried fertilizing them? Do they get at least 6 hours of sun a day?

And do they get adequate water?

kay

Thanks Mantis, I did noted down the cultivar names when I bought them but couldn't find the notes. I can take a picture of the flowers and post them. Flowers are quite huge and fragrant.

Surprisingly, couple of the daylilies I bought from Home Depot doubles in size every year and I share with friends and neighbors.

Thanks Shive, I do fertilize them twice a year and also it gets at least 7-8 hrs of Sun

Thanks Organic, yes, they get adequate water. Daylilies from home depot are in the same flower bed and they multiply.

My guess is that they were tissue cultured rather than just split from a parent plant. I bought some that were TC and they took 5 years to get established and take off.

I wonder if a club sale had tissue cultured daylilies. I wonder more if they were ones that did not perform well in the member member gardens so they brought them to the sale?

Dick, i wonder if those are one and the same.

Not sure how useful this reply will be, but... A number of years ago we bought Cosmic Sensation. Came as two fans. Every year thereafter, one or two fans. Never any increase. Finally this spring, seeing only one fan again, we had had enough. Dug it up. There were three fans growing sideways and slightly down. Sigh.

Id like to visit the Carpenter Farm again. That was such a fun trip. Payne’s in the Grass in Pearland it also a fun trip.