RELEASED 2025.03REASSESSED 2026.07.24

Gardena

Gardena smart Sileno free 600

The 600 is the small-lawn entry to the SILENO free range and carries the same wire-free premise as the 800: satellite positioning in place of a buried perimeter, with the cutting unit moved to the rear so the machine can turn and cut the edge. What it does not carry is an RTK correction station, so the boundary it holds is a satellite geofence rather than a centimeter-accurate line.

ReplacesGardena Sileno MinimoThe previous generation of this line.

PriceNot confirmed see pricing noteNot tracked yet

Autonomy Ladder

Why Level III.

One five-rung scale, every category, from acting only on command to working unsupervised anywhere.

VGeneralized AutonomyAny task, any setting. No consumer robot has reached it.
IVEnvironmental AutonomyHandles new obstacles and re-plans in real time; rare in consumer products.
To reach Level IVSustained operation across sessions, including layouts and conditions it has not met before.
IIIConditional AutonomyThis robot

Gardena smart Sileno free 600 finishes whole jobs in a space it already knows, and still needs a person at the edges.

Navigation and control
GNSS satellite positioning with an app-drawn virtual boundary and Gardena LONA operation logic. No perimeter wire; no separate RTK reference station.
Why this level
- The mower holds an app-drawn boundary and runs a full cycle without a person present, which clears Level II.
- It stops short of Level IV because the boundary is a satellite geofence without RTK correction, so positioning accuracy degrades under canopy and the operating domain is a defined, prepared lawn rather than an environment the machine reads for itself.
1 source reviewed
IIAssisted AutonomyRuns preset routines; stalls at anything new.
IManual AutomationOne action on command; no independent operation.

How we assign a level →

Human Readiness

Known Issues.

One question: what does buying this robot today walk you into? The state is computed from the record, and recomputed daily.

Ready NowOn sale past the first-90-day window, assessed, with no documented issues and no announced successor.
New to MarketOn sale under 90 days; the ownership record is still forming.
WaitA successor is announced and has not shipped; re-read the decision when it arrives.
Known IssuesThis robot

Documented problems stand on the record of Gardena smart Sileno free 600. Read the case before buying.
The documented case
- The free line's core promise is mowing without a buried wire, using satellite positioning instead.
- An independent editorial review of this model and multiple owner reports describe unreliable satellite signal causing the mower to stall under normal conditions, and the maker's own documentation concedes satellite positioning alone is not precise enough without correction data.
On the record
- Shipping since March 2025 · 18 months on the market
- 1 source reviewed
What would move it
The record resolving retires the call: a fix shipping, claims aligning with behavior, or independent reports converging.

How we assess readiness →

Robovations Score

How this number was reached

54of 100

LimitedAt or above 14% of the 382 robots we scoreand 7% of the 88 scored robot lawn mowers

DeficientLimitedCapableStrongExemplary

Measured on 8 of the 9 inputs14% not counted

Our assessment did not establish an independent source for software stability on this machine, so that input is left out of the score rather than guessed at, and the rest re-weighted to fill the space. A gap in what we have been able to verify is not evidence against the robot. Where it reaches 30% of the rubric we publish no number at all.

What moved itpoints gained or lost against a typical robot

Carried by

Consumables80+0.9
Support longevity68+0.5

Held back by

Task completion45−4.3
Coverage and navigation40−3.0
Edge-case recovery30−2.0

Capability40% of the score39What it does without you.

Task completion16% of the score45

Evidence

Galaxus published a long-form test of this machine and rated it two stars out of five, reporting that the owner had to carry it back to its base every morning. A mower that needs retrieving daily is not finishing its job unattended whatever its cutting quality, and the human is in the loop every single cycle rather than occasionally. That is below the 50 state.

Coverage and navigation10% of the score40

Evidence

The Galaxus test attributes the failure to satellite reception rather than to the cutting system: the GPS signal is unreliable, and it specifically does not hold under small trees or along the edges of the house. Coverage therefore depends on where the machine happens to be able to see the sky rather than on a retained plan of the lawn, which is close to the 25 state. It is placed above it because the two cutting discs and the underlying map do work where reception holds.

Edge-case recovery10% of the score30

Evidence

The same test reports a daily rescue: the owner brings the machine back to its base every morning. It neither recovers nor reliably reports its way home, and it is found stopped where it lost the signal. That is the 25 state, placed marginally above because the failure is a stall rather than damage to itself or the lawn.

Operating envelope4% of the score38

Evidence

Two commonplace garden features are documented as defeating it, small trees and the edges of the house, both of them things an ordinary lawn contains. A machine that needs open sky across the whole work area is operating in a constrained setting, which is the 50 state, placed below it because the constraint excludes conditions most target gardens actually have.

Dependability40% of the score64Whether it keeps doing it.

Field failure rate16% of the score62

Evidence

On sale since March 2025, so the under-twelve-month cap does not apply. No hardware failure pattern is reported in the sources read here; the documented problems are navigational rather than mechanical, and are scored on the inputs that describe them rather than counted twice here. Retail and review text is the only evidence channel, which the anchor caps at 65, and this sits just below that cap with no job-stopping mechanical mode established.

Software stabilitynot countedno source verified—

Evidence

No independent reporting on this model's update behaviour, release notes or regressions was found. The satellite problems Galaxus documents are reported as a characteristic of the navigation rather than as a regression introduced or fixed by an update, so they are not read across to this input. It carries no value and is excluded from the composite. This states what our assessment established, not that no such reporting exists.

Support longevity10% of the score68

Evidence

This input scores vendor-published terms as commitments. GARDENA publishes a two-year manufacturer's warranty extended to three years on registration of the machine, fulfils claims by repairing the returned product or supplying a working replacement free of charge, and runs a documented repairs-and-maintenance channel with an extensive original spare-parts range for the garden line. The terms explicitly exclude wear parts including blades and batteries, which matters on a machine whose battery is its service-life limit. Recorded with its terms so a later revision can score conduct against them.

Ownership burden20% of the score65What it asks of you.

Routine maintenance12% of the score55

Evidence

Blade changes and keeping the chassis clear are the routine, which is ordinary for the category. The daily retrieval the Galaxus test describes is a consequence of the navigation failure and is scored on the inputs that describe it, not counted a second time as a maintenance burden.

Consumables8% of the score80

Evidence

Blades are the only recurring part and are inexpensive against the purchase price, on an interval measured in months. No bag, filter or fluid. A low ongoing cost.

middle half of the databaseits medianthis robot

Read the full methodology →

FIT CHECK

Will the Gardena smart Sileno free 600 work on your yard?

Describe your yard using the controls. Each choice reads the spec sheet for you, flagging where the Gardena smart Sileno free 600 is built for your space and where it isn’t.

Yard size

Terrain

Grass type

Boundary setup

See every robot mower suited to these conditions

A classification of fit for the conditions you set, not a recommendation. Verdicts describe engineering design intent, not test results.

SPECIFICATION

The full spec sheet.

Manufacturer-published figures, measured against every robot lawn mower we track.

Dimensional drawing

Key specificationsManufacturer-published

Footprint: 16.9 × 24.8 in · 10.2 in tall✓
Weight: 30.5 lbs✓
Wi-Fi: Supported

Where it lands · ranked across 101 robot lawn mowersThis robotMedianTypical range

Runtime140min

30 min240 min

Near median

Noise58dB

50 dB82 dB

Near median

Charge time100min

30 min300 min

Near median

Weight30.5lbs

13 lbs134 lbs

Near median

Position shows where the figure sits across the tracked category, not a quality judgment.

Official referencesOwner manual Manufacturer support Product page

OWNERSHIP

Living with it.

The satellite geofence is the weak point; reviewers document dropouts and permanently skipped patches.

A Galaxus long-term review describes satellite signal loss and spots inside the defined mowing zones the free never touches, with no RTK station to tighten positioning. The mechanical platform and its 4-7 week blade life follow the settled SILENO routine.

Owner effort~60 minhands-on per month

Consumables$100replaceable parts / yr

Reliability trendMixedowner-reported arc

What goes wrong · 5 documented · 1 self-recover

Common

Satellite position lossSkipped patches, paused mowing

Owner fixImprove sky view; trim missed spots manually

Common

Blade wearRagged cut, higher energy use

Owner fixReplace blades and screws on both discs

Occasional

App or cloud outageControl and scheduling unavailable

Self-recoversCheck home Wi-Fi; wait out outages

Occasional

Grass-clogged wheelsPoor traction on slopes

Owner fixBrush the wheels clean

Occasional

Dirty charging contactsFailed or interrupted charging

Owner fixRub plates with fine emery cloth

Step-by-step fixesLeaving Uncut Patches or Missing Spots?Slipping on Slopes or Can’t Climb?Wet Grass or RainAll robot mower guides

Upkeep routine

Weekly52×/yr

Examine both blade discs and their pivoting blades, then clean the discs and chassis with a brush and running water; the manual forbids pressure washers and solvents. · Brush grass out of the wheels; the manual warns clogged wheels spoil performance on slopes.

Monthly12×/yr

Replace the blades and screws on both cutting discs as complete sets; Gardena documents a usual blade life of 4 to 7 weeks. A 9-blade kit with screws is $26.99 on Gardena's US shop, and the free's two discs take 6 blades per change.

Seasonal4×/yr

For winter, fully charge, switch off, clean, and store the mower dry and frost free on level ground; a charging station left outdoors should keep its power supply connected.

As neededno fixed schedule

Clean the charging plates and contact plates with a fine emery cloth and clear grass and twigs out of the charging station; the manual sets no interval for either. · Install firmware updates when the GARDENA smart system App offers them.

Safety notes

CautionTwo spinning blade discs: Switch the mower OFF and wear gloves before lifting it or touching blades.

CautionUnplug station before cleaning: Disconnect the power supply before cleaning the charging station or power supply.

NoteMow in daylight: Night schedules put hedgehogs and other small wildlife at risk.

RECORD

How the assessment has moved.

Every announcement, release and reassessment behind the current classification.

Coming soon

Just launched

Active updates

Settled

Discontinued

Aug 2026 · AssessmentReadiness reassessed: Promising Progress → Known Issues
Aug 2026 · AssessmentRobovations Score recorded at 54 of 100

Common questions

What people actually ask.

3 answered

CompatibilityDoes the Gardena smart SILENO free 600 need a boundary wire?

No. Gardena documents satellite-based positioning with a virtual boundary drawn in the app. That removes the wire-burial step entirely, and also removes the physical fallback a wire provides when the satellite fix degrades.

OperationHow is the 600 different from the SILENO free 800?

Rated lawn area. The 600 covers up to 600 square meters, the 800 up to 800. Both use the same wire-free satellite positioning and the same rear twin-disc cutting unit.

OperationCan it be bought in the United States?

Not as of this assessment. Gardena lists the SILENO free range on its international and European sites only, with a euro list price.

Cite / Embed

Reference the Gardena smart Sileno free 600 classification.

Embed the Autonomy Ladder™ mark or copy the citation. The mark is served from this record, so a reassessment updates it on your page automatically.

124161

268112

Clear space 3222 on all sides

Embed code

Scale proportionally only, up to 2× (536px wide)(224px wide). No recolouring, cropping, rotating, or re-typesetting.

Citation

Robovations. "Gardena smart Sileno free 600: Autonomy Level III (Conditional Autonomy)." Autonomy Ladder™, assessed July 2026. https://robovations.com/robots/gardena-smart-sileno-free-600/

Link it. The mark must point at this record. An unlinked mark is not authorised.
Hot-link it. Never download, self-host, or re-upload the image. A saved copy stops updating, and a mark that has stopped updating is a claim we no longer stand behind.
A classification, not an endorsement. It may not appear beside language implying Robovations recommends, rates, or approves the product.

Where to next

Three ways to keep going.

For evaluators

Compare with a peer.

See the Gardena smart Sileno free 600 and TerraMow V1000 side by side: autonomy level, Robovations Score, readiness, and price. Classification, not a verdict.

See the full comparison

Or compare with MOVA LiDAX Ultra 1000, Litheli Skope 800 AI-VISION, Kärcher RCX 4.

For browsers

See every Level III.

Every robot we’ve classified at conditional autonomy. Sorted by readiness, score, and price. Filter by category, manufacturer, or release date.

Browse the database

Updated weekly with new entries and reclassifications.

Gardena smart Sileno free 600

Will the Gardena smart Sileno free 600 work on your yard?

The full spec sheet.

Living with it.

How the assessment has moved.

What people actually ask.

Other robot lawn mowers we have classified.

TerraMow V1000

MOVA LiDAX Ultra 1000

Litheli Skope 800 AI-VISION

Kärcher RCX 4

Reference the Gardena smart Sileno free 600 classification.

Three ways to keep going.

Get the next reassessment.

Compare with a peer.

See every Level III.