It could happen to you - bud burn
Where folks were posting about yellowing buds, my problem was blackened buds first noticed when we had those very high temps and humid weather. I posted on the AHS Robin to see if any one could help me determine what had happened.
Most folks have never experienced this but several folks who live in the hot and humid zones, said it was sunburned buds and they had seen it before. Why some daylilies and not all of mine? Theory given it could be that some of the buds had more moisture within and therefore they became more susceptible to the extreme heat over several days.
Just so you know, these are the cultivars that got impacted:
INHERITED WEALTH, STEALTH BOMBER, WREN'S SONG, PINK DEBUTANTE and none of them are in the same garden bed. In fact they are pretty much spread out from each other. I've had long periods of hot weather before but never had this happen before. I've left them on and waiting to see what happens over the long term for documenting.
Here is the pic of what happened and of course, it had to be my beautiful INHERITED WEALTH so full of black buds.