What is Vermiculture?


Vermiculture is the process of garden composting using worms. The worms consume decaying organic materials and then flush them out of their systems, referred to as ‘worm manure’ or ‘castings.’ The worm castings are rich in nutrients, making the compost an all-natural fertiliser and excellent soil conditioner. The worms’ underground burrows also create soil channels, making the soil more porous and allowing water to move deeper in the soil column.

The Mighty Tiger Worm

  • The scientific name is Eisenia foetida, also known as Redworm, Red Wiggler, Brandlings or Manure Worm
  • The Tiger worm is an Epigeic worm, i.e. they live on the surface of the soil
  • Closely related to the common earthworm but are much more aggressive
  • Tiger Worms thrive in rotting vegetation, compost and manure
  • Are usually found feasting on heaps  of animal manure, rotting leaf mounds and other organic  materials that are on top of the soil
  • Tiger Worms possess all the characteristics needed for composting and have proven to be the most effective in the composting process
  • The gut of the worm is teeming with bacteria and enzymes with which it digests its food
  • Are capable of producing casings that are 100% natural
  • Are able to dig deep into the soil (up to inches to be exact) allowing a more loosened and aerated soil
  • Consume half or even as much as their body mass daily, its weight being from 0.5 to 1 gram
  • When the food supply stops, the worm colony will reduce to eggs in the soil, which can remain fertile for years waiting for the food to come back.


  • Tiger worms can easily tolerate temperatures from 3 to 27 degrees Celsius and will  burrow down to protect themselves, if needed.
  •  NaturalFlow’s worms are bred in Cromwell, Sth Island, NZ where the temperatures range from between,  -7 to 38oC
  • The Wastewater tanks are fully buried, this means the worms are living 1.2m or more below ground level. At this depth the temperatures are more stable, giving the worms a comfortable living environment.

Lifecycle of Tiger Worms

  •  Tigers take 53 to 76 days to reach sexual maturity and are bi-sexual
  • The eggs take 2-3 weeks to hatch
  • As a guide, in ideal conditions, you can expect to double the weight of your Tiger worm population in 3-4 months
  • 1 kg of adult worms would contain around 2,000 worms

Talk To Us Today

Waterflow NZ Ltd has professional Installers and Designers that cover every region of New Zealand, so where ever you are situated from the Cape to the Bluff, just call our friendly team now to find out the closest one to you.


What Others Think

“Gee I love you guys :)”

I was called this morning from Rangi to say the 6-monthly inspection is being done at 2pm today.

Your guy doing it has been held up, so he actually called to let me know.
This is never happens normally with tradie type people.

If your company ever needs someone to sell your systems up this end of the woods then give me an interview.
After my experience with all your people, I would be proud to sell it!

Kim Robson


What Others Think


“NaturalFlow system is such a basic and easy system to look after and operate. We are very pleased with it and are glad we went with the system. The grey water has certainly been great on the gardens and the black water bed once planted looks after itself. Great!”

Dennis & Marie


What Others Think

“Looks after itself”

“Back in 2008 along with our building projects we decided to go for the NaturalFlow sewage system as it didn’t require any power, on our site. We have been very impressed with the performance of this system, with very little maintenance, it basically looks after itself.
Without hesitation I would recommend the NaturalFlow system to anyone as I have had no difficulties with product or the friendly team at Waterflow NZ Ltd. 



What Others Think

“Low site impact”

Just a quick email to say a huge thank to you , ken & the team.
Stoked with the work done , the boys on the diggers did a awesome job .
Every thing was left nice & tidy , super happy !!
Xmas bonus for all !!

John Cullen