After Stump Grinding: The Hole, the Chips, and What to Plant

Decide about the grindings first

A grinder produces a surprising volume of material — often far more than seems possible from the stump you were looking at, because the chips are fluffed up with air. You have three reasonable options and one bad one.

The bad one is leaving the pile in place and expecting grass to grow through it. Fresh wood chips are a poor growing medium, they tie up nitrogen in the soil as they break down, and they will sit there looking like a mound for a very long time.

• Keep them as mulch — spread on beds around shrubs, not against trunks
• Have the crew haul them off — usually an add-on charge
• Use some as backfill mixed with soil, and remove the rest
• Do not simply leave the mound and reseed over it

Backfilling the hole properly

The most common mistake is filling the hole entirely with grindings, raking it flat, and calling it done. It looks fine for a month. Then the wood decomposes, the volume collapses, and you have a dip that gathers water every time it rains — which in Tallahassee is often.

Fill mostly with clean topsoil instead. If you want to use some grindings, mix them in at no more than roughly a quarter of the volume, and keep the top few inches pure soil so grass has something to root into.

Mound the fill slightly above the surrounding grade — an inch or two proud. It will settle down to level over the following weeks. If you fill it dead flat, you will end up with a depression.

• Remove most of the grindings before filling
• Backfill with clean topsoil, not wood chips
• Keep the top few inches pure soil
• Mound slightly above grade to allow for settling
• Water it in to collapse air pockets, then top up

Getting grass to take in Tallahassee

Once the hole is filled and settled, you are matching whatever lawn you already have. Around Tallahassee that is usually centipede, St. Augustine, zoysia, or bahia — and how you patch depends on which.

Centipede and St. Augustine spread by runners and are almost always patched with sod or plugs rather than seed. Bahia and some zoysias can be seeded. Cutting a piece of sod to fit is the fastest route to a spot you cannot pick out a year later.

Timing matters here. Warm-season grasses establish through the warm months, so a patch laid in spring or early summer knits in fast. One laid in late autumn mostly sits there until the following season.

• Match the existing grass type before buying anything
• Centipede and St. Augustine: sod or plugs, not seed
• Lay sod on soil, never directly on grindings
• Keep it consistently damp for the first two to three weeks
• Expect to top up the level once as it settles

Planting a new tree — read this first

You generally cannot plant a new tree directly into a freshly ground stump hole, and it is worth understanding why rather than trying and losing the tree.

The old root plate is still down there. As it decays it consumes nitrogen, creates voids the new root ball settles into unevenly, and can host fungal decay organisms that were living on the old tree. A young tree planted into that is starting at a disadvantage.

The practical answer is to plant a few feet to the side, into undisturbed soil. If it truly has to be the same spot, you are looking at full stump removal and fresh soil rather than grinding.

• Plant 3–6 feet to the side, in undisturbed soil
• Or grind deep and remove the grindings entirely, then bring in fresh soil
• Or opt for full removal if the exact spot is non-negotiable
• Do not plant into a hole backfilled with wood chips

Watch for sprouting over the next year

Grinding removes the stump but not the roots, and some species respond by pushing suckers up from the remaining root system — sometimes several feet away from where the tree stood.

Around Tallahassee, laurel oak and sweetgum are the usual offenders, and sweetgum in particular can send shoots up across a wide area of lawn. Catching them early, while they are soft green shoots rather than woody stems, makes them far easier to deal with.