Ken and Larry, I hope I'm not preaching to the choir, here, but have you tried using the zinc metal stake plant markers, with the 12 inch long metal legs? I get them from The Lily Auction site. The image is from their listing. (They are an instant buy. No waiting for an auction to end!) I've found them to have the most reasonable prices so far. These markers hold up to weather and they don't disturb nearly as easily as the plastic markers. I just started using them, this Spring (2016), and there's been no disturbance to them thus far. The professionals use these, so I figure that they're good enough for li'l ol' me, too!!
Also, I find that if I handle one group of fans from one cultivar at a time and label every separated fan or clump of fans, before digging up the next cultivar, reduces (not foolproof!) the chance of mixups. Once the daylily is planted, I'll attach this temporary label to a landscape fabric pin and pin it to the ground nearby, temporarily, until I can make up a permanent metal label for it. Kind of a "critter-resistant" tactic! It even works through the wintertime!!
Again, hope I'm not preaching to the choir!!!....
As always, Happy Gardening!!!
