Plant guarantees from NZ landscapers are not standardised — they vary from company to company, and some smaller operators offer none at all. That said, many reputable landscapers do provide a limited guarantee on plants they supply and install, typically ranging from 30 days to 12 months. Knowing what to look for before you sign a contract can save you a lot of frustration down the track.
What a Typical Plant Guarantee Covers
When a landscaper does offer a plant guarantee, it usually covers plant death or significant decline within a set period after installation, provided the homeowner has followed the agreed care instructions. Common inclusions are:
- Replacement of plants that die within the guarantee period
- Labour to remove and replant (sometimes, but not always)
- Coverage for defects that were present at the time of supply
What guarantees typically do not cover includes drought stress caused by inadequate watering, pest or disease damage, vandalism, extreme weather events, or failure to follow the landscaper's aftercare advice.
Why Plant Guarantees Are Complicated
Unlike a tap fitting or a painted wall, a living plant's survival depends on many factors outside the landscaper's control. NZ's climate varies enormously — from the humid, subtropical north to the cold, frosty south — and what thrives in Auckland may struggle in Christchurch. Key variables include:
- Soil conditions — pH, drainage, and nutrient levels all affect establishment
- Watering — most new plantings need consistent moisture for at least the first summer
- Seasonal timing — plants installed in late autumn generally establish more easily than those planted in the heat of summer
- Plant provenance — locally grown stock from a reputable NZ nursery tends to establish better than imported or poorly hardened-off plants
Because so many variables sit with the homeowner after handover, landscapers are understandably cautious about open-ended guarantees.
What NZ Consumer Law Says
Even without a written guarantee, you have rights under the Consumer Guarantees Act 1993 (CGA). When a landscaper supplies plants as part of a service, those plants must be of acceptable quality and fit for purpose. If a plant was clearly unhealthy at the time of installation, or the wrong species was supplied, you may have a remedy regardless of what the contract says.
Consumer NZ has useful guidance on your rights when tradespeople supply goods as part of a service. It's worth a read before you engage anyone.
Note that the CGA applies to consumers, not businesses — if you're having landscaping done on a commercial property, different rules may apply.
What to Ask Your Landscaper Before You Sign
Get clarity on the following points in writing before any work begins:
- Is a plant guarantee offered, and for how long?
- What conditions must be met to keep the guarantee valid? (e.g., irrigation requirements, mulching)
- Does the guarantee include replacement labour, or just the plant?
- Where does the landscaper source their plants? Reputable operators use established NZ nurseries and can tell you so.
- Who is responsible if an extreme weather event kills the plants?
A written quote or contract that spells these things out protects both parties.
How to Give Plants the Best Chance
Even with a guarantee in place, your goal is healthy, established plants — not a replacement cycle. Here's how to support new plantings:
- Water deeply and regularly for the first 6–12 months, especially through NZ's dry summers
- Apply mulch (bark or wood chip, 75–100 mm deep) around the root zone to retain moisture and suppress weeds
- Avoid over-fertilising newly installed plants — it can burn roots and stress the plant
- Monitor for pests and disease early, as stressed new plants are more vulnerable
- Follow any specific aftercare instructions your landscaper provides in writing
BRANZ and Energywise both note that well-planned planting — including species selection suited to your local climate — significantly improves long-term outcomes.
Choosing a Reputable Landscaper
A landscaper who offers a reasonable plant guarantee is usually signalling confidence in their plant sourcing and installation quality. Look for operators who:
- Are members of Registered Master Landscapers NZ or the Nursery and Garden Industry New Zealand
- Provide a detailed written quote that includes plant species, sizes, and aftercare requirements
- Can show you previous work or provide references
- Are transparent about where they source their plants
You can find qualified local landscapers on tradedirectory.co.nz — always get at least two or three quotes and compare what each guarantee actually covers.
When to Call a Professional
For anything beyond basic planting — such as retaining walls above certain heights, irrigation systems, outdoor lighting, or significant earthworks — you may need a licensed tradesperson or even a building consent. Check with your local council about consent requirements before work begins. MBIE Building Performance has guidance on what triggers a consent under the NZ Building Code.
For electrical work associated with outdoor lighting or water features, only a registered electrician can carry out restricted work — check the Electrical Workers Registration Board to verify a tradesperson's licence.
Licensed Building Practitioner (LBP)
