Frequently asked questions

Here you can find the mostly asked questions about the Robotic Lawnmower.

How do I know if the Robotic Lawnmower is suitable for my garden?

Very easy! Check our robotic mower advisor here and you will find out which robotic mower is suitable for your garden.

Or simply check if your garden is suitable using the product specifications.

GARDENA SILENO city (15001-20), GARDENA smart SILENO city (19069-20):

  • Lawn area size: Maximum 250 m² +/- 20%
  • Inclination inside the working area: maximum 35%
  • Narrow passage: Minimum 60 cm (from wire to wire)

GARDENA SILENO city (15002-20), GARDENA smart SILENO city (19066-20):

  • Lawn area size: Maximum 500 m² +/- 20%
  • Inclination inside the working area: maximum 35%
  • Narrow passage: Minimum 60 cm (from wire to wire)

GARDENA SILENO life (15101-20), GARDENA smart SILENO life (19113-20):

  • Lawn area size: Maximum 750 m² +/- 20%
  • Inclination inside the working area: maximum 35%
  • Narrow passage: Minimum 60 cm (from wire to wire)

GARDENA SILENO life (15102-20), GARDENA smart SILENO life (19114-20):

  • Lawn area size: Maximum 1000 m² +/- 20%
  • Inclination inside the working area: maximum 35%
  • Narrow passage: Minimum 60 cm (from wire to wire)

GARDENA SILENO life (15103-20), GARDENA smart SILENO life (19115-20):

  • Lawn area size: Maximum 1250 m² +/- 20%
  • Inclination inside the working area: maximum 35%
  • Narrow passage: Minimum 60 cm (from wire to wire)

GARDENA SILENO+ (4055-60), GARDENA smart SILENO+ (19064-60):

  • Lawn area size: Maximum 1600 m² +/- 20%
  • Inclination inside the working area: maximum 35%
  • Narrow passage: Minimum 60 cm (from wire to wire)

GARDENA SILENO+ (4050-60), GARDENA smart SILENO+ (19065-60):

  • Lawn area size: Maximum 2000 m² +/- 20%
  • Inclination inside the working area: maximum 35%
  • Narrow passage: Minimum 60 cm (from wire to wire)


For more information, see operating instructions or visit the "Products" section of this Website.

Can I use a GARDENA Robotic Lawnmower for separate working areas?

If the working area consists of two separate lawn areas where the Robotic Lawnmower can’t move by itself, we recommended making it possible to lay the wire to the other areas. In this case, the Robotic Lawnmower is supported manually between main and secondary areas. Use the MAN mode / other area and the Robotic Lawnmower mows until the battery is empty. Using this method, you will need to take the Robotic Lawnmower to the charging station by yourself.

See the operating instructions for detailed information about this procedure.

Must the charging station be placed on the lawn or could it be placed on a vegetable patch?

The area in front of the charging station is a high-traffic location. The Robotic Lawnmower should be able to start in any directionsand return to the charging station from any direction. For the (smart) SILENO city / SILENO / SILENO+ you have a choice of where to position the charging station. For further information, see section "How to install the charging station for the GARDENA Robotic Lawnmower" in the operating instructions.

How small can the narrow passages for the GARDENA Robotic Lawnmower in my garden be?

It is better to avoid long narrow passages and Areas narrower than 1.5 m. Otherwise the Robotic Lawnmower might mow the passage for too long or be unable to remove itself from the passage.

How narrow could the passages (approx. 1 m in length) for the GARDENA Robotic Lawnmower in my garden be?

That depends on the Robotic Lawnmower. R38Li, R40Li, R45Li and R50Li: The minimum width is 90 cm between the boundary wires. R70Li, (smart) SILENO city / SILENO / SILENO+: The minimum width is 60 cm between the boundary wires.

How much grass does the GARDENA Robotic Lawnmower leave standing at the edge?

The width of the uncut grass strip depends on how close the boundary wire can be laid to the edge of the lawn.
  • e.g. at 5 cm (R38Li, R40 Li, R45Li, R50Li and R70Li) or 10 cm ((smart) SILENO / SILENO+) from the lawn edge, along brick paths that can be passed by the Robotic Lawnmower, there will be no uncut grass strip.
  • e.g. at 20 cm (R38Li, R40 Li, R45Li, R50Li and R70Li) or 25 cm ((smart) SILENO / SILENO+) from the lawn edge, along beds or crushed rock that cannot be driven by the Robotic Lawnmower, there will be a narrow strip of grass.
  • e.g. at 30 cm (R38Li, R40 Li, R45Li, R50Li and R70Li) or 35 cm ((smart) SILENO / SILENO+) from the lawn edge, along a wall or around trees, there will be a slightly wider strip of grass.
To make sure that the grass is completely mowed or that only small strips of uncut grass are left, change the layout of your garden, for example by edging the lawn with curb stones or concrete slabs at lawn height.

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