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Gardena Smart Sileno Free 600m² specifications and in-depth review

Gardena Smart Sileno Free 600m²

Manufacturer: Gardena

The Gardena Smart Sileno Free 600m² is a robotic lawn mower designed for residential lawns, handling a recommended area of 600 m² while capable of covering up to 720 m² at maximum capacity. It connects to a dedicated smartphone app via Bluetooth, allowing remote control and scheduling without requiring a Wi-Fi connection. The mower operates autonomously with auto-docking and returns to its base station without user intervention.

Weighing 13,820 g and measuring 430 mm wide by 630 mm deep, the unit runs on an 18.5V removable battery that fully recharges in approximately 1.7 hours, drawing 43.37W during operation. Cutting height is adjustable between 25 mm and 45 mm across two settings, with a 22 cm cutting width and a working area capacity of 353 m²/h. It handles slopes up to 30% and includes an obstacle sensor, rain sensor, frost sensor, and weather adaptation logic, allowing it to operate in wet conditions while pausing automatically when frost is detected.

Pros
  • The removable battery charges fully in just 1.7 hours, minimizing downtime between mowing sessions
  • Frost and rain sensors combined with weather adaptation allow the mower to operate autonomously without manual intervention in changing conditions
  • Obstacle detection and auto-docking enable hands-free operation once scheduled
  • Mulching capability eliminates the need to collect or dispose of grass clippings
  • Can handle slopes of up to 30%, covering a reasonable range of residential lawn terrain
  • Working area capacity of 353 m²/h paired with a maximum coverage of 720 m² makes it suited for medium-sized properties
Cons
  • Only two cutting height settings offer limited flexibility for fine-tuning grass length
  • No anti-theft features, leaving the unit vulnerable if used in unsecured outdoor spaces
  • No Wi-Fi support means remote access is limited to Bluetooth range
  • Incompatible with Alexa or Google Assistant, so voice-based automation is not possible
  • No display on the unit itself, requiring the smartphone app for any status checks or adjustments
Who is this for?

This mower is well suited to homeowners with medium-sized lawns up to 600 m² who want a largely autonomous mowing routine without regular manual involvement. The combination of scheduling, auto-docking, obstacle detection, and weather-adaptive sensors makes it a practical fit for users who prefer a set-and-forget approach. Those with moderately sloped gardens of up to 30% will also find it capable of handling their terrain without issues, and the mulching feature appeals to users looking to avoid the hassle of collecting grass clippings.

Who is this NOT for?

Users with large properties exceeding 720 m² will find the coverage capacity insufficient for their needs. The absence of Wi-Fi connectivity limits remote access to Bluetooth range, making it a poor fit for those who need to monitor or control the mower from a distance. Households that rely on smart home ecosystems built around Alexa or Google Assistant will find no integration support here, and users who require fine-grained control over cutting height beyond two fixed settings may find the limited adjustment range frustrating.

General info:

audible noise 58 dB
Has a dedicated smartphone app ✓
supports Wi-Fi ✕
audible noise (eco) 50 dB
Has Bluetooth ✓
cutting width 22 cm
Is electric ✓
height 260 mm
recommended area 600 m²
supports a remote smartphone ✓
lawn area coverage 720 m²
thickness 630 mm
volume 70434 cm³
weight 13820 g
width 430 mm

The Gardena Smart Sileno Free 600m² is an electric robotic lawn mower with a recommended coverage area of 600 m² and a maximum lawn size capacity of 720 m². It has a cutting width of 22 cm and connects to a dedicated smartphone app via built-in Bluetooth, enabling remote control from a mobile device, though it does not support Wi-Fi. The mower does not have a display. In terms of physical dimensions, it measures 430 mm wide, 260 mm tall, and 630 mm deep, with a total volume of 70,434 cm³ and a weight of 13,820 g.

Features:

has an obstacle sensor ✓
Has a rain sensor ✓
can be scheduled ✓
has anti-theft features ✕
auto docking ✓
works with Alexa ✕
compatible with Google Assistant ✕
Has a display ✕
has a frost sensor ✓
Has mulching feature ✓
adapts to weather conditions ✓
works in rain ✓

The mower includes an obstacle sensor and a rain sensor, and it can operate in rain while also adapting its behavior to changing weather conditions. A frost sensor allows it to detect low temperatures and adjust accordingly. It supports scheduled mowing and returns to its base automatically via auto-docking. The mulching feature is included, allowing cut grass to be redistributed back onto the lawn. The unit does not have a display and lacks anti-theft features. It is not compatible with Alexa or Google Assistant, and voice assistant integration is not supported.

Performance:

slope performance 30%
mowing time 140 m
number of cutting height settings 2
maximum cutting height 45 mm
minimum cutting height 25 mm
working area capacity 353 m²/h

The mower delivers a working area capacity of 353 m²/h and can handle slopes of up to 30%, making it suitable for lawns with moderate inclines. Mowing time is rated at 140 minutes per session. Cutting height can be set to one of two positions, with a minimum of 25 mm and a maximum of 45 mm, allowing some flexibility depending on the desired grass length.

Power:

charge time 1.7 hours
has a removable battery ✓
voltage 18.5V
wattage 43.37W

The mower operates at 18.5V and draws 43.37W during use. Its battery is removable, which simplifies replacement or charging outside the unit. A full charge takes 1.7 hours, keeping downtime relatively brief between mowing sessions.

Final Verdict

The Gardena Smart Sileno Free 600m² is a competent autonomous mowing solution for medium-sized residential lawns, bringing together a solid set of sensors, scheduling capability, and a removable battery with a short charge time into a coherent package. Its fully autonomous operation — driven by obstacle detection, weather adaptation, frost and rain sensing, and auto-docking — reduces the need for user involvement to a minimum once configured. That said, its Bluetooth-only connectivity, limited cutting height settings, and lack of smart home integration mean it is better suited to straightforward setups than to users seeking deep automation or fine control. For homeowners with a lawn within its coverage range and a preference for hands-off maintenance, it presents a well-rounded and capable option.

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