Robot Mower Seasonal Use

Robot Mowers  · 

Open the season with a human cut

A robot mower is built to shave small amounts of growth often, not to knock down a winter’s accumulation. Start the season by strimming or mowing the lawn down to your intended working height in two passes, lowering the deck gradually so you do not scalp the crowns. Clear the surface first: fallen branches, windblown rubbish, pine cones and stones all damage blades and can stall the disc. Once the turf is at height and the ground is firm, hand over to the robot and let it hold the level for the rest of the season. Starting the robot on long, matted grass means it works at maximum load for weeks.

Summer: raise the cutting height and protect the turf

When growth slows in heat or drought, a low cut stresses the grass further by exposing the crown and the soil surface to sun. Raise the deck a step or two and keep to the rule of removing no more than about a third of the leaf in one pass, which is easy for a robot that runs often. Fine mulched clippings return moisture and nutrients; coarser clippings from a blunt blade or a heavy cut smother the turf and bale up in the deck. On warm-season grasses a slightly taller cut helps them ride out hot spells, and on cool-season lawns in drought it is better to let the mower stay docked than to keep shaving dormant, brittle growth. Run during the cooler hours.

Autumn: leaf load, thatch and slipping

Falling leaves change the job. A layer of leaves on the surface hides the grass, blocks the sensors and forces the blade to mulch wood instead of leaf, which dulls the edge quickly. If the leaf fall is heavy, collect most of it with a blower or a collecting mower and let the robot deal with the residue, or increase the schedule frequency so it never faces a thick carpet. Keep the cutting height up rather than down, because a leaf layer plus a low deck means the mower drags and clumps. Wet leaves on a slope are the worst autumn combination: traction drops and the machine can slide, so watch the first runs after rain and clear the dock apron where leaves collect.

Winter storage: clean, charge level, temperature, off the ground

Winter is spent stored, and how you store it decides whether spring is a service or a replacement. Clean the underside first, since soil, clippings and sap hold moisture against metal and seals, then let the machine dry before it goes away. Check the blades and either sharpen or replace them so the machine is ready rather than waiting. Leave the lithium pack at a partial charge rather than full or empty, because both extremes age a cell faster than the middle of its range. Store the mower at a moderate temperature indoors rather than in a freezing shed or a hot loft; if the pack is removable, bring it inside on its own. Lift the machine off concrete or paving on blocks or a shelf so damp cannot creep into the deck, keep it covered against rodents and dust, and decide whether the dock stays powered. Most mower manufacturers expect the boundary wire to be left in place over winter.

Spring wake-up checks before the first run

Before the machine goes back to work, work through it in order. Update the firmware if there is an update available, then check the pack’s health and charge behaviour — a battery left flat for months often will not hold its previous runtime. Inspect the wheels for play, the gearboxes for noise, and the blade disc for a bent or missing blade. Confirm the lift sensor and stop button still behave, and look at the charging pads for the winter’s corrosion. Then walk the boundary wire, check the signal or loop status in the app, and run one supervised session on a small zone before committing the mower to a full schedule.

Boundary wire after a hard winter

Frost heave lifts shallow wire, tensions buried runs and snaps splices, and heaving roots can pull a loop out of alignment. The first symptoms are an intermittent wire fault, a mower that stops in one particular spot, or a docking failure at the end of a run. Walk the perimeter and look for wire pushed above the surface, kinked sections and any splice that has been re-exposed. Check the loop’s continuity or signal reading from the dock, since a partial break shows up as increased resistance before it fails completely. Re-seat lifted wire, re-bury it at a consistent depth with some slack at corners, and redo any splice with a waterproof connector rather than tape. Check the guide wire as well, because it follows the same ground.

FAQ

Should I store the battery full or empty for winter?

Neither. Lithium packs age fastest at the extremes, so a partial charge somewhere in the middle of the range is the storage state to aim for. Store the pack at a moderate indoor temperature, and if it is removable, keep it out of a freezing shed for the winter.

Can the boundary wire stay in the ground over winter?

Yes, and leaving it in place is the normal routine; lifting it would mean reinstalling the loop each spring. Expect to inspect it after frost, because heave pushes shallow runs to the surface and can crack splices even when the copper core is intact.

Why does the mower cope so badly with autumn leaves?

Leaves are tougher than grass and they bury the surface, so the blade mulches wood and dulls quickly while the sensors lose sight of the ground. Collect the bulk of the fall and keep the deck higher, so the robot is dealing with a residue rather than a carpet.

Do I need to mow before the robot starts in spring?

Yes, if the lawn has grown long over winter. Take it down in stages with a strimmer or mower to the height you want the robot to maintain, clear stones and debris, and then let it take over. A robot asked to remove weeks of growth will work at full load and cut poorly.