I love lemon thyme. I can't say how many of the upright plants I have lost to winter kill over the years. Let's just say I finally gave up and now stick to the creeping variety. It does well for me. The taste and the lemon scent are delicious. More than that, see how great it looks creeping across the stones! Not bad for November in zone 4.
When we were having furry mole and vole trouble, the crocuses growing through or near the lemon thyme were spared and bloomed while the others became lunch.