Failing to Provide Winter Protection
In colder regions, thin-mulching with straw or covering with breathable fabric can shield thyme from freeze–thaw cycles that heave crowns. I lost a beloved variety one winter to crown lift—after switching to a light burlap wrap, it emerges flawless each spring! Avoid heavy mulch that traps moisture, opting instead for just enough to mitigate soil movement.
A little winter prep means less time replacing plants come spring and ensures your thyme starts the season vigorous, ready to carpet pathways and host the first pollinators of the year!