How to Fix Exposed Tree Roots and Dead Grass in Your Parkway

The Dilemma

A homeowner recently asked:

My parkway grass is completely dead, and the tree's exposed roots run from the curb to the sidewalk, leaving me wondering if I should add topsoil for sod or just cover it all in mulch.

The GardenOwl Diagnosis

The parkway strip between the sidewalk and the street is the toughest real estate in any yard. When you throw a mature shade tree into that confined space, it becomes a battleground. This is a classic case of The Hydraulic Competition Syndrome. The tree's massive root system and dense canopy have completely outcompeted the turf for moisture and sunlight, leaving behind a barren wasteland of dead grass and thick, surfing surface roots.

To make matters worse, there is a tight ring of scalloped pavers stuffed with bunched-up black landscape fabric choking the base of the trunk. This setup is actively destroying the home's curb appeal and slowly suffocating the tree.

The Trap

When homeowners see exposed roots and dead grass, their first instinct is usually to fight back with heavy machinery and a wallet full of cash. They assume the problem is a lack of soil. The trap is thinking you can just dump six inches of topsoil over those roots, lay down fresh sod, and call it a day.

Do not do that. Trees in tight parkways naturally push their roots to the surface to breathe and stabilize in compacted soil. Piling thick, heavy topsoil over them is a guaranteed way to cut off their oxygen supply and slowly kill a mature tree.

Furthermore, grass is a lost cause here. Turf requires massive amounts of water and sunlight. It cannot compete with a mature tree canopy. Trying to force turf into heavy root zones is the absolute most common waste of money I see. You are fighting a war you will inevitably lose.

Even worse is the 'tree ring of death' sitting at the base of the trunk. That black fabric and paver border traps moisture right against the bark, inviting rot and disease. It is a textbook example of poor soft engineering.

The Solution (Deep Dive)

We need to stop fighting the tree and start working with it. This requires a shift from high-maintenance turf to a low-maintenance, woodland-style understory.

Step 1: Free the Root Flare Rip out those scalloped pavers and that bunched-up black landscape fabric immediately. You must expose the root flare, which is the widened base where the trunk transitions into roots. Trees need to breathe at this junction. According to University of Maryland Extension guidelines on mulching, keeping materials pulled back from the trunk prevents fatal bark rot.

Step 2: Ditch the Grass for Arborist Chips The smartest move is a unified bed of coarse arborist wood chips running from the sidewalk straight to the curb. This naturally protects those exposed roots from getting hacked by string trimmers and drastically improves the miserable, compacted soil beneath it as it breaks down over time. Lay down two to three inches of chips, but keep them a few inches away from the actual trunk. If you want to understand why standard rock or gravel is a terrible idea here, read up on Why Gravel Under Trees is a Trap (And How to Fix a Bare Rental Yard).

Step 3: Taper the Edges, Do Not Trench A common mistake when adding mulch is trying to dig a trench along the sidewalk and curb to keep the chips from spilling over. Do not dig down along that concrete in this specific situation. Those roots are already surfing the topsoil because the ground is tight. Slicing a two-inch trench against the concrete means you are going to hack straight through the shallow structural and feeder roots. Instead, simply taper your arborist chips down to bare pavement at the edges.

Step 4: Plant Sweeping Masses of Natives To stop the parkway from looking like a barren mulch pit, you need to add structural groundcover. Plant a sweeping mass of low-growing dry shade natives directly into the natural pockets between the heavy surface roots. A solid, continuous patch of something like Pennsylvania sedge or wild ginger creates visual calm and a connected texture. You can check the Audubon Native Plant Database to find sedges native to your region.

These native plants will naturally lock that mulch in place once they establish and their roots knit together. They do the exact same job as a physical trenched edge without forcing you to chop up the tree. Planting in cohesive groups rather than isolated polka-dots is crucial for visual impact, a concept detailed in Why Your Fence Line Looks Empty (And Why 1-Meter Spacing Fails).

The Diagnostic and Visualizing Safety Net

Before you buy a pallet of sod or start hacking away at structural roots with a trenching spade, you need a plan. It is incredibly hard to visualize how a sweeping mass of sedge will look compared to a failing lawn. If you want to test exactly how wood chips and native groundcovers will look in your specific parkway, upload a photo to our Exterior Design App. GardenDream acts as a safety net, scanning your photo to identify spatial limits and helping you map out plant masses before you spend a dime at the nursery. It is the best way to ensure your design works with nature rather than against it.