Texas Gardening: What is eating my liriope?, 1 by WombatFamily

WombatFamily wrote:
So I should've taken a pic before I cleaned up the liriope border. 5 of the 30+ plants I put down a couple months ago are completely destroyed. The rest are fine, healthy, big blue berries on them. The other ones went completely brown and utterly died. I saw some tiny snails when I pulled out the dead plants today. Are snails the culprits?

Or several of my plants have white "stuff" on the ground near them, is that some kind of mold / rot? My sage is looking a little pale and peaked.