Quick answer: As of 28 May 2026, anyone in New Zealand can grow industrial hemp without a licence — just notify Police and MPI before planting. The THC threshold has been raised from 0.35% to 1%. For natural builders and hempcrete enthusiasts, this is a landmark shift: local hemp hurd (the material used in hempcrete walls) can now be grown by anyone, potentially cutting the cost and supply constraints that have held back NZ’s hempcrete building industry.
Two days ago, something significant happened that barely made the mainstream news: New Zealand quietly became one of the most hemp-friendly countries in the world for growers. The licensing requirement that had governed industrial hemp cultivation since 2001 was abolished. No licence. No application fee. No waiting period. Just notify, plant, and grow.
For the NZ sustainable building community, this is the most significant regulatory shift in decades. Here’s what actually changed, why it matters, and what it means for anyone interested in building with hemp.
What Changed on 28 May 2026
Industrial hemp has been legal to grow in New Zealand since 2001 — but only with a Ministry of Health licence. The application process, compliance requirements, and restricted THC threshold (0.35%) kept the industry small and the licence count low. Most NZ hempcrete builders have been importing hemp hurd from overseas, primarily Europe, adding cost and supply chain complexity to every build.
The December 2025 legislative amendment (which came into force 28 May 2026) changed this in three important ways:
- Licence requirement abolished: Anyone can now grow industrial hemp in New Zealand. No Ministry of Health licence required.
- THC threshold raised: The allowable THC content has increased from 0.35% to less than 1%, bringing NZ in line with international standards and opening up a wider range of hemp varieties to growers.
- Hemp biomass pathways opened: Hemp biomass (including leaves and flowers) can now be supplied to licensed medicinal cannabis producers, creating additional revenue streams for hemp growers beyond fibre and seed.
What Still Applies
Deregulation doesn’t mean no rules. Key requirements that remain:
- Notification: Growers must notify both Police and MPI (Ministry for Primary Industries) before planting.
- Import and export: Still requires a Ministry of Health licence. If you want to import hemp seed varieties from overseas or export hemp products, the licence requirement remains.
- Food products: Businesses using hemp in food must register with NZ Food Safety.
- Animal feed: Regulated by MPI separately.
Why This Matters for Natural Building
Hempcrete — a mixture of hemp hurd (the woody core of the hemp stalk), hydrated lime, and water — is one of the most promising natural building materials available in NZ. It’s carbon negative, breathable, thermally excellent, fire resistant, and pest resistant. But it requires hemp hurd at scale, and until now, sourcing NZ-grown hurd was difficult and expensive.
The numbers make the case clearly: approximately three acres of hemp yields enough hurd for a 150m² hempcrete house. With hemp now licence-free, a landowner in Golden Bay, Central Otago, or Northland can grow their own building material — reducing cost and keeping supply chains entirely local.
NZ already has commercial hemp hurd supply infrastructure — Hemp New Zealand operates a decortication plant in Christchurch, and Tai Tokerau Hemp in Northland is developing a mobile decorticator. But the removal of the licence barrier will accelerate the growth of local hemp fibre supply dramatically, particularly in regions where hempcrete construction is already active (Wanaka, Golden Bay, Taranaki).
The NZ Hemp Building Industry: Where It Stands Now
Even before this deregulation, NZ had a small but genuinely active hempcrete building sector. A handful of completed homes — primarily in Wanaka and Central Otago — have demonstrated that hempcrete is consent-achievable in NZ under the Building Code’s Alternative Solutions pathway. The Hemp Building Association NZ (HBANZ) has been working to add hempcrete as a formal NZ Building Code standard, and in October 2024, Tim Steedman of HempCentral (Taranaki) was appointed to the joint ANZ hempcrete building standard working group.
Key NZ companies active in hemp building as of mid-2026:
- Kohu Hemp (kohuhemp.nz) — Takaka, Golden Bay. Supplier and builder using locally sourced hemp hurd. Runs hempcrete workshops (101 and 102 level). The most accessible entry point for NZ homeowners interested in hempcrete.
- Erkhart Construction (erkhartconstruction.co.nz) — Wanaka. The most documented NZ hempcrete builder. Multiple completed homes in Central Otago. Also runs a hempcrete AirBnB studio in Wanaka — a rare opportunity to actually stay in and experience a hempcrete building before committing to building one.
- HempCentral (hempcentral.earth) — Queensberry, Central Otago. Runs hempcrete construction training courses in partnership with Erkhart.
- Hemp New Zealand (hempnz.co) — Operates NZ’s largest commercial hemp decortication plant in Christchurch. Primary supplier of NZ-grown hemp hurd for building.
- Hemp Building Association NZ (hba.nz) — Industry advocacy and consent support. Their FAQ is an essential first stop for anyone planning a hempcrete build.
How to Start Growing Hemp in NZ Now
If you have land and want to grow hemp for building material, fibre, or seed, the process as of 28 May 2026 is:
- Select your variety: You need a variety with THC below 1%. The NZHIA (nzhia.com) maintains a list of approved varieties. If you want to import seed from overseas, you still need a Ministry of Health import licence — but NZ-sourced seed is now available from local growers without a licence.
- Notify Police: Contact your local police district before planting. This is a legal requirement even under the new deregulated framework.
- Notify MPI: Contact MPI before planting. This enables traceability and is required by the new rules.
- Plant and grow: Hemp is a relatively low-input crop. It grows in most NZ conditions, is drought-tolerant once established, and matures in 100–120 days. For fibre and hurd production, it’s typically harvested before seed set.
- Process or sell: For building use, the stalks need to be retted and decorated to separate the hurd from the fibre. Small-scale on-farm processing is feasible; commercial-scale requires a decorticator. Hemp New Zealand can process NZ-grown hemp.
The Broader Picture
This deregulation is part of a broader shift in NZ’s approach to hemp. The New Zealand Hemp Industries Association (NZHIA) has spent years lobbying for exactly this change, and its arrival signals a maturing of NZ’s hemp policy framework. The combination of licence-free growing, a higher THC threshold, and new biomass pathways positions NZ to develop a genuine domestic hemp industry — one that could supply building materials, textiles, food, and pharmaceutical feedstock from the same crop.
For the sustainable building movement specifically, this is the supply-side unlock that the hempcrete sector has been waiting for. Imported hemp hurd is expensive and carbon-costly to ship. Local NZ hemp, grown in the regions where hempcrete building is already active, transforms the economics and the environmental case simultaneously.
Frequently Asked Questions
Can I grow hemp in my backyard?
Technically yes — the law doesn’t specify minimum land area. However, hemp is a field crop that benefits from space, good soil, and isolation from neighbours (particularly if you want to maintain a specific variety). Suburban backyard growing is legal but impractical for building-material quantities. If you have rural land, you’re well placed.
Is industrial hemp the same as cannabis?
Industrial hemp and cannabis are both Cannabis sativa but differ fundamentally in THC content and in what they’re grown for. Industrial hemp has THC below 1% (now the NZ threshold) and is grown for fibre, seed, and hurd. The intoxicating varieties used for medicinal or recreational purposes have much higher THC levels and remain regulated separately. Industrial hemp plants look similar to cannabis but contain negligible psychoactive compounds.
How much hemp do I need to grow for a hempcrete house?
The common industry figure is approximately three acres of hemp to yield enough hurd for a 150m² hempcrete home. This is roughly the yield from a moderately productive NZ hemp crop. The fibre (the outer stalk) is a separate co-product that can be used for textiles or sold to processors.
Where can I buy hemp seed in NZ now?
Contact the NZHIA (nzhia.com) for up-to-date information on approved NZ seed varieties and domestic suppliers. Some established NZ hemp growers sell seed. For imported seed varieties, the import licence requirement from the Ministry of Health still applies.
Who should I contact to learn more about hemp growing in NZ?
The NZ Hemp Industries Association (nzhia.com) is the primary industry body and the best first contact. Their newsletter, member network, and annual iHemp Summit are the hub of the NZ hemp industry. For building-specific questions, HBANZ (hba.nz) is the right contact.
The Bottom Line
The deregulation of hemp growing in NZ is genuinely significant — for farmers, for the natural building community, and for anyone who believes that what we build with matters as much as what we eat. Licence-free growing removes the single biggest barrier to local hemp hurd supply, and local supply is what makes hempcrete economically viable at scale in NZ.
If you’ve been curious about hempcrete but held back by concerns about supply and cost, the picture just got meaningfully better. Read our full guide: Can I Build a Hempcrete Home in NZ?
Sources: NZ Hemp Industries Association (nzhia.com), RNZ, 1News, Ministry of Health industrial hemp regulations. This article covers regulatory changes as of 28 May 2026 — always verify current requirements with MPI and NZ Police before planting.