Last year I had Catherine Neal with crown rot.
First I removed any rotting leaves & such, then hit her with Tinkers daylily booster (1 oz sorghum molasses - I use dark, can't find sorghum here; 1 tsp epsom salt, 1 Tbsp baking soda in a gallon of water) and then let it sit overnight. then I dug her out, cleaned up the crown and roots, did a bleach dip, allowed to dry, then redipped in water to rinse and allowed to dry - then potted her up. She survived last summer..... I wonder where I planted her in the fall.....
Previously, I have never managed to save any using that protocol. And perhaps she survived because of the drought. The 2 other ones I treated last year didn't survive.
I too do not replant in the same place. In fact, I remove as much soil as I can from that location, then let it sit open for the summer. In fact, one of the ones I am watching this year, is in the same location as one of the other ones. Guess I didn't clean it out enough, or it's coincidence.
I too have a couple I am watching, I may be doing this over the weekend methinks ~Jan