TN, Zone 7B.... no-mow perennial cover
Hey there! I'm from KY, zone 6B. I haven't mowed my partially-shaded back lawn in.... almost two months. It started because I prefer to mow right before it's about to rain, so the plants have lots of water to recover from the top-off, and I just couldn't get the timing right. Then the shaded areas just stopped growing taller, so I thought 'huh, ok then.' and now I'm not mowing the back because there's no need to.
Idk your opinion on how 'lawns' should look - you mentioned it was heavily mulched earlier, so you might even be dealing with more of a 'garden you can walk through' instead of a lawn.
I like my richly weed-filled lawn =P It gets a lot of pollinators in the spring, and in the summer it stays cool & lush without watering.
so! Here are my suggestions for 'plants you can walk on, and also generally seem to cap out their height mid-shin or lower'
Note: Only a few of these are USA-native plants. Most are naturalized 'weeds' from asia/africa/europe that just do very well in our climates.
Only for aesthetics - don't walk on it.
Stonecrop / Seedum - fluffy and lush-looking, low-lying, but it's a succulent so walking on it will damage it.
Good for occasionally walking on, but not severe traffic:
Creeping Thyme (There are many species - some with purple or yellowish leaves, vs the dark-green common shade) Common chickweed Clovers Wild violetCreeping jenny - Lysimachia nummularia Broadleaf Plantain - Very lush foliage. Tends to form clumps that may not be attractive, but they're always cool & feel wonderful under bare feet in the summer. Rattlesnake plantains - native to TN! Creeping Woodsorrel - Looks like delicate clover with yellow buttercup flowers, Stays low to the ground
Good for heavy traffic areas:
Buffalo Grass will grow to 10-14 inches long, but the blades bend over when they get long, so the grass is only 4-7 inches 'tall' - It's a USA native plant! Dandelion. Their flowers/puffballs might poke up higher, but the vegetation seems to top out around calf-level. Annual bluegrass grows 6 to 8 inches high when left unmowed, and then stops growing. It's a lush carpet and I love it.Ribwort Plantain / Buckhorn plantain keeps a good, low, lush height for the most part, but they also shoot up taller flower spikesCreeping Charlie (not to be confused with Henbit or purple Deadnettle) - It generally creeps along the ground, flowers are similar in appearance to henbit/deadnettle, but it only gets 'tall' when it's trying to climb UP something. I haen't really seen it get tall in the middle of the yard. Creeping Fescue - it grows best in cool seasons, spring and fall, and will turn brown during the summer's hottest weather - however, it's just dormant and will perk back to green very quickly as soon as the temps drop and water returns.