Passive Earth · Tree Guardian — back to home
Menu
Home Field results How it works The pilot Savings model FAQ Book a 30-min call

Field results · BC Interior pilot · summer 2026

Same site, same watering cycle. Five weeks in.

35°C stretches, heavy wind, full sun, no shade. Every tree on the same 7-day cycle, including one that stretched to 10 days over a weekend. This page is the running record: it grows as the pilots report.

The five-week comparison

Control tree on a standard surface bag at five weeks with a thinning, yellowing canopyControl — standard bag
Standard-bag control: thinning, yellowing canopy at five weeks.
Tree Guardian tree of the same species at five weeks holding a fuller canopyTree Guardian
Tree Guardian, same species a few metres away: fuller, greener canopy on the identical cycle.
Tree Guardian bur oak with a dense green canopy at four weeksTree Guardian
Tree Guardian bur oak, week 4: dense canopy through the same heat.

Our trees are thriving — a Tree Guardian honey locust holding full canopy through the same heat that's thinning the controls. Straight from a phone at the site.

The install, in two minutes — municipal crews at the pilot site.

The control trees, up close — beside ours

Honey locust controls on standard surface watering bags, photographed at five weeks — sparse canopies, yellowing and scorched leaflets. The gallery advances on its own; click any photo to enlarge it. On the left, our Tree Guardian trees from the same site on the identical watering cycle — both galleries advance on their own, side by side.

Tree Guardian honey locust at five weeks, full green canopy above the cityTree Guardian
Tree Guardian honey locust at five weeks holding canopy through 35°C heat and heavy windTree Guardian
Tree Guardian honey locust at five weeks along the pilot pathTree Guardian
Tree Guardian honey locust at five weeks over the city skylineTree Guardian
Green leaflets on a Tree Guardian honey locust at five weeksTree Guardian
Tree Guardian honey locust at five weeks near the pilot path benchTree Guardian
Tree Guardian honey locust branches in full sun at five weeksTree Guardian
Tree Guardian bur oak at five weeks, full green crown above the lake and cityTree Guardian
Tree Guardian bur oak canopy at five weeks against blue skyTree Guardian
Tree Guardian bur oak leaves close-up at five weeks, healthy and greenTree Guardian
Green leaflets on a Tree Guardian honey locust branch at five weeksTree Guardian
Tree Guardian bur oak at five weeks with the city and lake behind. Note: a week-1 assembly error in this early prototype stalled water delivery and the bur oak shed its leaves — it grew back a healthy canopy. Our newest design eliminates this.Tree GuardianA week-1 assembly error in this early prototype stalled water delivery and the bur oak shed its leaves — it grew back a healthy canopy. Our newest design eliminates this.
Bur oak canopy close-up at five weeks, dense green leaves. Note: a week-1 assembly error in this early prototype stalled water delivery and the bur oak shed its leaves — it grew back a healthy canopy. Our newest design eliminates this.Tree GuardianA week-1 assembly error in this early prototype stalled water delivery and the bur oak shed its leaves — it grew back a healthy canopy. Our newest design eliminates this.
Tree Guardian bur oak crown at five weeks against the skyTree GuardianOur other bur oak — dense, healthy canopy through the same five weeks of heat and wind.
Tree Guardian bur oak at five weeks with stake, city belowTree Guardian
Tree Guardian bur oak at five weeks, dense foliage along the stemTree Guardian
Tree Guardian bur oak at five weeks, full view at the fence lineTree Guardian
Tree Guardian honey locust at five weeks, green canopy above the lake and cityTree Guardian
Tree Guardian honey locust branches at five weeks, healthy leaflets over the valleyTree Guardian
Tree Guardian honey locust at five weeks in full sun, leafy against the skyTree Guardian
Our trees: twenty photos, rotating — Tree Guardian, same site, same 7-day cycle.
Control honey locust on a standard surface bag at five weeks, thin sparse canopyControl
Control honey locust crown at five weeks, sparse yellowing leafletsControl
Control honey locust at five weeks against the hillside, thin crownControl
Control honey locust at five weeks, mostly bare branchesControl
Control tree at five weeks with standard watering bag, nearly bareControl
Yellowing, scorched leaflets on a control tree at five weeksControl
Control branch at five weeks with dried, browning leavesControl
Control tree at five weeks, defoliated with standard watering bag at baseControl
Control tree at five weeks, dead brown leaves on bare branchesControl
Yellowing leaflets on a control honey locust at five weeksControl
Control honey locust at five weeks along the road, sparse crownControl
Control tree at five weeks, wilting drooping leavesControl
Control tree canopy at five weeks, wilted and curlingControl
Control honey locust at five weeks by the fence, thin foliageControl
Control tree at five weeks with standard watering bag, very sparseControl
Control honey locust at five weeks — plenty of leaves but curling, with browning tips; the best-looking control, on a smaller-trunk treeControl
Control honey locust at five weeks with stake and watering bagControl
Control tree at five weeks beside the path, sparse yellowing crownControl
The controls: eighteen photos, rotating — standard bags, same five weeks.

Where the water actually goes

Surface watering bag draining through a holeControl — standard bag
The status quo, photographed at our pilot site: a surface bag draining through a punched hole. Standard bags empty in 5–9 hours either way — the water is gone the same day, and the tree waits dry until the next visit.
Runoff trail spreading downhill from a surface watering bagControl — standard bag
Observed in our pilot: the runoff trail below a surface bag — water spreading downhill instead of reaching the root ball.
Tree Guardian installed on a newly planted oakTree Guardian
Tree Guardian on the same site: sealed wicking delivery to the root ball, 7–10 days per fill.

What's measured next

These photos are observational. The measured comparison — survival at 12 and 24 months and visit cadence — comes from the municipal pilots, starting with the summer 2026 install. Continuous soil-moisture data comes from a separate ten-tree UBC + University Neighbourhoods Association science pilot at Hampton Place with postdoctoral monitoring, now pending approval. For municipal pilots, wireless soil-moisture sensors are an optional add-on should you wish for more data. AGTIV REACH mycorrhizal fungi supplied for trials · Patent pending · Supported by Foresight Canada.

Partner branding withheld pending publicity clearance. Results will be posted here as they come in.

Want this comparison running in your city?

Book a 30-minute call Pilot details →
Get the one-pager