Touchwood Nursery
A 15-acre wholesale nursery south of Perth reports saving 15 million litres, 16.85% of its annual licence, over the 12 months to May 2026. These are the site's own figures from a signed letter, not a controlled trial.
Conducted by Reported by Ben Archibald, Founder of Touchwood Nursery, in a site letter dated 26 May 2026. No controlled comparison was run and no independent verification was supplied.
- LOCATION
- 35 Born Road, Casuarina, Western Australia 6167
- PERIOD
- 12 months to 26 May 2026 · unit installed January 2024
- EQUIPMENT
- 100mm President Water Vortex Generator, on the site irrigation supply
What the trial measured
What the site reports
THE STANDOUT RESULT- Touchwood Nursery reports a saving of 15,000,000 litres over the 12 months to 26 May 2026.
- That is 16.85% of the nursery's 89,000,000 litre annual water licence.
- The nursery states it typically uses its full licence allocation or slightly exceeds it.
- A single 100mm President Water vortex generator was installed on the irrigation supply in January 2024, so the reported window covers the unit's second year in service rather than its first.
- The founder states the reduction was achieved while continuing to deliver healthy plants, with no drop in output quality reported.
The operation
- 15-acre wholesale nursery on the southern outskirts of Perth, Western Australia.
- Over 20 staff, supplying the retail and landscape trade.
- One 100mm unit treats the irrigation supply for the whole site.
- The nursery frames the saving as part of a broader commitment to sustainable water management rather than as a trial outcome.
Basis of the figures
- The figures come from a signed letter from the nursery's founder, dated 26 May 2026.
- They are the site's own numbers. No third-party audit, billing extract or meter record was supplied alongside them.
- The saving is expressed against the licence allocation rather than against a measured prior-year consumption figure.
- President Water's own internal summary of this letter recommends the figures be attributed explicitly to the customer rather than presented as verified test results. This page follows that recommendation.
“Our licence is for 89,000,000 litres per year, which we use or go over slightly. Over the past 12 months, this innovative system has saved us an extraordinary 15,000,000 litres (16.85%) of water.”
A wholesale nursery lives and dies on its water licence. Touchwood runs 15 acres of container stock in a Mediterranean climate on an 89 million litre allocation it already uses in full, which means every litre saved is either headroom it did not have or stock it could not otherwise carry.
The reported figure is 15 million litres over twelve months from a single 100mm unit on the main supply. If that holds, it is close to a sixth of the licence recovered without changing anything about how the nursery is run.
The honest framing matters more here than the number. This is a customer letter, not a trial. There is no untreated block at Touchwood running alongside the treated one, no metering method on record, and no plant measurements to sit beside the water figure. Rainfall, planting mix and any other efficiency work done since January 2024 are not accounted for.
So read this as what it is: an operator with a licence to protect, two years into running the equipment, putting his name to a number. That is worth something, and it is a different kind of evidence from the Marri Park meters or the SR TAFE beds. It should not be added to them or averaged with them.
Trial at a glance
- SITE
- Touchwood Nursery, 35 Born Road, Casuarina, Western Australia 6167
- OPERATION
- 15-acre wholesale nursery, over 20 staff, retail and landscape trade
- EQUIPMENT
- One 100mm President Water Vortex Generator on the site irrigation supply
- INSTALLED
- January 2024
- REPORTING PERIOD
- The 12 months preceding 26 May 2026
- WATER LICENCE
- 89,000,000 litres per year
- REPORTED SAVING
- 15,000,000 litres, stated as 16.85% of licence
- EVIDENCE TYPE
- Signed site letter from the founder. Single site, no control area
- VERIFICATION
- None supplied. Metering method, billing data and third-party checks not provided
- STATEMENT BY
- Ben Archibald, Founder, Touchwood Nursery, 26 May 2026
Findings that cut against the headline. We publish them because a grower deciding on a retrofit deserves the whole picture.
- Single site with no comparison group. No area of the nursery was irrigated without the vortex generator over the same period, so the reported saving cannot be isolated from other factors.
- The figures are self-reported. The underlying metering method, billing data and any third-party verification were not supplied.
- Confounding factors are not addressed: year-on-year rainfall, planting mix, irrigation scheduling changes, staffing, and any other efficiency measures introduced since January 2024 are not quantified or ruled out.
- No plant health or yield data accompanies the water figure. The letter states plant health was maintained but provides no measurements.
- These figures should not be combined with, averaged against, or directly compared to the replicated trial data elsewhere on this site, which was measured by different methods.
Read the underlying report
Every figure on this page is traceable to the documents below. Nothing is modelled, estimated, or extrapolated.
CITATIONArchibald, B. (2026). Touchwood Nursery site letter, 26 May 2026. Touchwood Nursery, 35 Born Road, Casuarina, Western Australia. Reporting the 12 months to 26 May 2026.
President Water Company · presidentwater.com · Touchwood Nursery, 12 months to 26 May 2026 · unit installed January 2024