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How to Prep Your Robotic Lawn Mower for Spring
How to Prep Your Robotic Lawn Mower for Spring
Your robotic mower has been sitting in the garage all winter. Before you send it out on its first cut of the season, it needs more than a power-on test. This guide walks through every step — blades, boundary wires, software, battery, and settings — so your mower is ready to run all season without issues.
Whether you own a Yarbo, FJDynamics, TerraMow, or BESTMOW, this checklist applies across all GPS and wire-based robotic lawn mower systems.
Spring is the most important time of year for your robotic lawn mower. Grass comes back hard after winter — thicker, rougher, and full of debris — and a mower that hasn't been properly inspected will either underperform or break down entirely in its first few weeks.
The good news: spring prep takes less than an hour, and doing it right sets you up for a season where your mower genuinely handles itself. Here's everything you need to do before your first cut.
<1hr
Total time for full spring prep
8
Key steps to complete before first cut
2×
Faster blade wear on first mow without prep
1
Season of clean, automated mowing ahead
The 8-Step Spring Prep Checklist
Work through these in order. Steps 1–3 are physical inspection; steps 4–6 are system and software; steps 7–8 are first-run settings.
1
Clear the Yard Before Anything Else
Walk your lawn and remove anything that wasn't there in fall: fallen branches, rocks, toys, tools, animal waste, and any debris that accumulated over winter. Robotic mowers are not designed to handle large debris, and a single hidden branch can damage blades or jam the cutting deck within minutes of its first run.
2
Inspect and Replace the Cutting Blades
Robotic mower blades are small, replaceable razor blades — not traditional lawn mower blades. They dull quickly and should be replaced at the start of every season regardless of how sharp they appear. Dull blades tear grass rather than cut it cleanly, which stresses the turf and leaves your lawn looking ragged. Replacement blades are inexpensive; don't skip this step.
3
Clean the Mower Body and Cutting Deck
Use a dry or lightly damp cloth to wipe down the chassis, sensors, and camera (if equipped). Clear any dried grass clippings from the cutting deck with a brush. Blocked sensors cause navigation errors; a caked deck can reduce cutting efficiency and put strain on the motor. Never use a pressure washer. Most robotic mowers are water resistant, not waterproof.
4
Check the Boundary Wire or GPS Perimeter
Wire-based mowers: Walk the entire perimeter wire and look for any breaks, kinks, or sections that have been pushed above ground by frost heave. Even a small break will prevent the mower from locating its boundary. Use the signal detector in your mower's app to confirm the loop is intact before running.
Wire-free / RTK / GPS mowers: Open the app and confirm your saved perimeter map is intact. If you made any landscape changes over winter (new beds, edging, obstacles), update the map before the first cut.
5
Update the App and Firmware
Open your mower's companion app and check for firmware updates. Manufacturers push software improvements, navigation refinements, and seasonal optimizations during the off-season. Running outdated firmware means missing performance improvements that have already shipped. Allow the update to complete fully before powering the mower on for its first run.
6
Test the Battery and Charging Station
Bring the mower inside or to a temperate space and allow it to charge fully before its first run. Lithium batteries stored in cold garages over winter may show a reduced charge capacity on first cycle. This typically normalizes after a full charge and discharge cycle or two. Also inspect the charging station contacts for corrosion or debris and wipe them clean with a dry cloth.
7
Set the Cutting Height Higher Than Usual
For the first 2 to 3 mows of spring, raise your cutting height setting by one or two levels above your usual preference. Early spring grass is coming out of dormancy and is often uneven. Cutting too short too soon stresses the turf and can scalp low spots. Let the mower bring the height down gradually over the first few sessions.
8
Run a Supervised Test Cut First
Don't set the mower loose on a full autonomous schedule until you've watched it complete at least one full perimeter patrol and cutting pass. Confirm it's navigating cleanly, returning to the dock without issue, and that blades are engaging properly. Five to ten minutes of observation on the first run can catch any issues before they become costly problems mid-season.
What You'll Need
Spring prep doesn't require special tools. Most of what you need is either already on hand or available from your mower manufacturer's accessories page.
| Item | Used For | Where to Get It |
|---|---|---|
| Replacement blade set | Swapping out dulled winter blades | Manufacturer accessories page |
| Soft-bristle brush | Cleaning cutting deck and chassis | Any hardware store |
| Dry microfiber cloth | Wiping sensors, body, contacts | Any hardware or home goods store |
| Boundary wire kit (spare) | Repairing any breaks in perimeter wire | Manufacturer accessories page |
| Mower companion app | Firmware update, perimeter check, settings | App Store / Google Play |
| Torx screwdriver (T10 or T15) | Blade replacement on most models | Any hardware store |
Pro Tip: Blades First, Always
If you only do one thing on this list, replace the blades. A dull blade is the single most common reason robotic mowers underperform in spring. The cost is minimal, usually under $15 for a full set, and the difference in cut quality is immediate.
5 Common Spring Mistakes to Avoid
These are the most frequent issues we hear about from customers each spring. All of them are avoidable with a few minutes of preparation.
🔪
Skipping Blade Replacement
Blades dull over a season. Starting spring with old blades tears grass and overworks the motor.
📡
Ignoring the Perimeter Wire
Frost heave and ground movement breaks wires over winter. A broken loop means your mower won't run correctly.
📱
Skipping the Firmware Update
Outdated firmware means missing navigation improvements and seasonal updates your manufacturer already shipped.
✂️
Cutting Too Short Too Soon
Spring grass isn't ready for a low cut. Scalping stressed turf in April leads to patchy, damaged lawn all season.
🍂
Not Clearing Debris First
Sticks, rocks, and winter debris can jam blades or damage the cutting deck on the very first run.
Spring Mowing Schedule Tip
April to May: Run at a higher cut height, 3 to 4 times per week as growth is rapid. Let the mower mulch clippings back into the lawn.
Late May onward: Drop to your preferred cut height and let the mower operate on its standard schedule. Most robotic mowers handle this autonomously once settings are dialed in.
Frequently Asked Questions
How often should I replace robotic mower blades?
For most users mowing a standard residential lawn, blades should be replaced at the start of each season (spring) and again mid-season if you notice the cut quality declining. Higher mowing frequency, larger yards, or terrain with sand and grit will wear blades faster. Most manufacturers recommend inspecting blades every 1 to 2 months during the active season. Replacement sets are inexpensive, typically $10 to $20, so there's no reason to run on dull blades.
My robotic mower won't find the charging dock. What should I check?
This is almost always a boundary wire or signal issue after winter. Check the dock's guide wire connection first, then walk the perimeter wire looking for any above-ground breaks or disconnected sections. For GPS/RTK models, confirm your perimeter map in the app hasn't been reset and that the dock location is correct. Also wipe the charging contacts on both the dock and mower. Corrosion from winter condensation is a common culprit.
Can I use my robotic mower in early spring when the ground is still wet?
Most robotic mowers can handle light moisture, but running on saturated or muddy ground is not recommended. Wet conditions cause soil compaction under the mower's wheels, can clog the cutting deck with wet clippings, and may cause wheel slip that disrupts navigation. Wait until the ground is firm and the grass is dry before running the first session of the season. Most models allow you to set a rain delay so the mower won't auto-launch after rainfall.
Do I need to update the mower's schedule for spring?
Yes. Grass grows significantly faster in spring than in summer or fall. Most users need to increase mowing frequency in April and May, typically to daily or near-daily sessions, then dial it back as growth slows. Your mower's app will have a schedule setting where you can program this. Some newer models with AI lawn monitoring will adjust automatically, but it's worth reviewing the schedule manually at the start of the season.
Should I store my robotic mower inside over winter?
Yes, if possible. Most manufacturers recommend storing the mower indoors in a dry, temperature-stable space during the off-season. Extreme cold can degrade lithium battery capacity over time, and moisture exposure accelerates corrosion on charging contacts and sensors. If you did store it outside or in an unheated garage, allow the unit to warm up to room temperature and complete a full charge cycle before running it in spring.
Do robotic lawn mowers work on slopes?
Yes, within limits. Most residential robotic mowers handle slopes up to 35 to 45% grade depending on the model. RTK and GPS-based mowers like Yarbo and FJDynamics are particularly capable on uneven terrain. If your lawn has steep or irregular slopes, check your specific model's slope rating in the specs, and ensure the boundary is correctly mapped around any areas that exceed the limit. Wet slopes reduce traction and should always be avoided.
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