Thats funny...I have the same thing happening to mine too!
One huge mature plant is really looking rough. Some small pups in another spot look better.
If anyone knows, please share your thoughts!
Good luck Stacey!

MonaRae

Your Yuccas will do that. The plant that bloomed the nicest last year will die out. The plant will send up new ones. It's an on going process. It's hard to kill a Yucca. I'm sure they are alright. It's just the off year for your's.
Sandy

Yeah, i dug up a huge yucca i found flowering in the ditch near cedar rapids and the next spring it didn't even put out a leaf. So i cut off all the roots and put them sparingly all over and now i've got a bunch of yuccas!