TNZ BioGro certified organic inputs

TNZ BioGro certified
organic inputs


TNZ Growing Products embraces organic certification - the world’s most widely-used, secure and impermeable traceability system.

BioGro is the most recognised organic logo amongst New Zealanders. It is the mark of a certified organic product and guarantees a product has been made without GMO, animal testing and the routine use of synthetic pesticides.


Every BioGro certified product can be traced back to its origin. For example using certification, we can pinpoint the exact field where an apple was picked or where sphagnum moss peat was harvested.

The organic certification process makes sure every stage in the ‘chain of custody’ between the producer and the consumer is secure and meets BioGro’s organic requirements. This certification process is what empowers consumers to trust organic brands.

How Biogro certification works?

The process includes checking a producer’s Organic Management Plan and conducting an annual audit. BioGro visit farms, packing facilities, warehouses, stores and manufacturing operations to make sure our practices meet organic standards and requirements. Only when BioGro’s organic requirements have been met does a producer receive BioGro certification.

We can provide the following BioGro certified inputs:

PEAT - Dried, screened 0-8mm (A-grade)
PEAT - Dried, screened 0-5mm (Fine - cell plug)
BARK - Dust (0-8mm)
BARK - Flake (8-14mm)

***Please note, TNZ peat is not approved for use organically
as a soil conditioner. It is approved as a propagation media only.








Approximately 44–48% moisture content. Pure peat that is dried, sterilised and screened to a very fine grade. Ideal for cell plugs, seedlings and trays.

A Grade


Approximately 44–48% moisture content. High quality, export grade peat that is dried, sterilised and screened. Used across the horticultural industry as a general growing media. Perfect in potting mixes.

Bark Dust


Dust is a grade of fine bark used for mulch, composting, potting mix, as well as a weed suppressant and growing media.

Bark Flake


Flake is the size of a small pea. It is used for potting mix, as a weed suppressant, as decorative bark and a growing media in sheltered areas.

*TNZ Nelson branch does not have BioGro certification, organic certified products are dispatched from the Invercargill site.