Removing a small tree stump yourself is a satisfying weekend project that's well within reach for most homeowners — provided the stump is genuinely small (generally under 30 cm in diameter) and the tree wasn't a large or complex species. With the right tools, a bit of patience, and attention to safety, you can have that stump out and your garden looking tidy in a day.
Before You Start: Check for Hidden Hazards
Before you reach for a spade, take a few minutes to assess the site:
- Underground services: Water pipes, drainage lines, and electrical cables can run surprisingly close to tree roots. Call Dial Before You Dig (0800 248 344) or check with your local council to identify any buried services near the stump.
- Root spread: A stump's roots can extend well beyond the visible trunk — sometimes two to three times the canopy width of the original tree.
- Tree type: Some species, such as tree privet, woolly nightshade, and other pest plants, are controlled organisms under the Biosecurity Act. Check with your regional council before removing or disposing of these, as there may be rules around how you handle the material.
- Proximity to structures: Roots near foundations, retaining walls, or fences may be load-bearing in unexpected ways. If in doubt, get an arborist's opinion first.
Tools You'll Need
For a small stump, you won't need heavy machinery. Gather the following:
| Tool | Purpose |
|---|---|
| Sharp spade or mattock | Digging around the root ball |
| Pruning saw or reciprocating saw | Cutting through roots |
| Loppers | Trimming smaller roots |
| Pry bar or digging bar | Levering the stump loose |
| Heavy-duty gloves | Hand protection |
| Safety glasses | Eye protection from flying debris |
| Steel-capped boots | Foot protection |
You can hire a stump grinder from most hire centres (including Mitre 10 and Bunnings) if you'd prefer a mechanical approach — more on that below.
Method 1: Manual Removal (Best for Stumps Under 20 cm)
This is the most straightforward approach for very small stumps with shallow root systems.
- Cut the stump low using a chainsaw or handsaw, as close to ground level as possible. This gives you better leverage later.
- Dig a trench around the stump, about 30–40 cm out from the base, exposing the main lateral roots.
- Cut through the roots using a pruning saw, loppers, or reciprocating saw. Work your way around the stump systematically.
- Lever the stump free using a pry bar, rocking it back and forth to break any remaining tap root.
- Extract the stump and as many large roots as practical. Smaller feeder roots will decompose naturally.
- Backfill the hole with topsoil, tamp it down firmly, and reseed or turf as needed.
Method 2: Stump Grinder (Best for Stumps 20–30 cm)
A hired stump grinder makes quick work of larger stumps. These machines are powerful — treat them with respect.
- Always read the hire company's operating instructions thoroughly before use.
- Wear hearing protection, safety glasses, and steel-capped boots — grinders throw chips at high speed.
- Keep bystanders (especially children and pets) well clear of the work area.
- Grind the stump to at least 15–20 cm below ground level if you plan to turf over the area.
- The resulting wood chip mulch can be used in garden beds, but avoid using it directly around edible plants until it has composted.
For guidance on safe equipment use, WorkSafe NZ has useful resources on operating hired machinery safely.
Method 3: Chemical Stump Removal
Chemical stump removers (typically potassium nitrate-based products) are available at hardware stores. They work by accelerating the natural decomposition of the wood over several weeks to months. This method is slow but low-effort:
- Drill a series of holes into the top and sides of the stump.
- Fill the holes with the chemical granules and add water as directed.
- Keep the area away from children and pets during treatment.
- Once the wood has softened, break it up with an axe or mattock and remove.
Note that chemical methods are not suitable if you need the area cleared quickly, or if the stump is near a vegetable garden or waterway.
Disposing of the Stump and Roots
- Green waste bins may accept small root material — check with your local council.
- Transfer stations generally accept green waste for a small fee.
- Chipping or composting on-site is a great option if you have the space.
- Do not burn stumps or roots without checking your council's open burning rules — many urban areas prohibit this.
When to Call a Professional
Some situations are best left to a qualified arborist:
- The stump is larger than 30 cm in diameter, or the root system is extensive.
- The tree was close to a building, fence, or underground services.
- You suspect the species may be a pest plant with special disposal requirements.
- The ground is on a slope or the stump is on unstable terrain.
- You're unsure about any aspect of the job — a professional assessment is always worthwhile.
A qualified arborist has the equipment and expertise to remove stumps safely and efficiently. You can find experienced local arborists on tradedirectory.co.nz.