Tertill the weeding robot in a tomato garden.
Tertill Weeding Robot
Tertill Weeding Robot
Tertill Weeding Robot
Tertill Weeding Robot
Tertill Weeding Robot
Tertill Weeding Robot

Tertill Weeding Robot

Regular price $349.00 FREE Shipping & FREE Returns

Tertill is designed to help more people enjoy the many health and wellness benefits of gardening - without all the weeding. Tertill lives in the garden, runs on sunshine, and weeds every day. It's the perfect gardening companion!

  • Solar-Powered & weatherproof - Stays in garden from spring through fall
  • Kills pre-emergent weeds with specially designed wheels
  • Chops down sprouted weeds with string trimmer
  • Easy set up - No Programming or mapping - just push the button
  • Proven as effective as hand weeding by the Cornell School of Agriculture
  • Uses height to tell plants from weeds - comes with guards to protect small plants
  • Weeds in 2-5 minute intervals for 1-2 hours a day
  • Maintains up to a 200 square foot garden
  • From the inventor of Roomba


  • Solar-powered weeding robot, with
    • 10 Plant Guards
    • 10 Row Guards
    • 10 Replacement whacker strings
    • Laminated garden planner 

      We hope you love Tertill as much as we do! If you are not entirely satisfied with your purchase, you have 60 days to return your Tertill from the date of purchase. We will refund 100% of the cost of Tertill plus any applicable sales tax and even pay for shipping Tertill back to us.

      Please review the Where Tertill Works page to make sure that Tertill is right for your application.


      Please email support@tertill.com and tell us why you would like to return Tertill. We will review your request and then create a USPS postage paid return label.

      Pack up Tertill and all accessories (in the original box if possible) and mail it back to us. Please include the RMA number and your original order number or other proof of purchase.  NOTE: We cannot accept Tertills that are damaged from mishandling, falls or misuse. 


      Once we receive your robot, we will inspect it and notify you on the status of your return. If your return is approved, we will refund 100% of your purchase price plus applicable sales tax. The time it takes for the credit to post to your account depends on your card issuer's policies.

      Contact Us

      If you have any questions on how to return Tertill, contact us at support@tertill.com.

      You can always contact us about any operating questions, or repair inquiries.

      How does it know a weed from a plant?

      Tertill has forward-facing sensors that detect plants. When they sense a plant, Tertill turns away. Plants too short to reach Tertill’s edges are assumed to be weeds. You keep short plants safe by placing provided plant guards around them until they are tall enough for Tertill to recognize. When Tertill approaches the guard, it will sense it and turn away.

      How does it remove them? won’t the weeds just grow back?
      Tertill has two mechanisms for keeping weeds out of your garden. First, by continuously roaming over the soil, it prevents many would-be weeds from successfully germinating, much like a well-worn path. Then, if there are weeds that manage to grow, it whacks these weeds using a spinning string trimmer, which cuts the weed off near the ground. Because Tertill lives in your garden and goes looking for weeds every day, weeds are always small when the robot finds them. A whacked weed may sprout again, but sprouting takes energy stored in the seed or root. By coming back every day, Tertill never lets a weed develop the leaves it needs to replenish this energy, so eventually, the weed gives up and dies.
      How does Tertill know where the edge of my garden is?
      There needs to be at least a 4-inch barrier around your garden to keep Tertill from wandering away. The barrier might be a fence, edging, or the wooden border of a raised bed. Tertill has a simple, reliable strategy to ensure that it covers the garden, using algorithms similar to Roomba and other robotic vacuums.
      Why does Tertill stop so much?
      Tertill is able to maintain up to a ten by twenty-foot garden by carefully managing how it uses the power it collects from the sun. A key to this is Tertill’s ability to run for small amounts of time throughout the day. Over the course of a day, the total run time will be between one to two hours depending on the amount of sunlight available. More details are available on our support site.
      Do I need to charge my Tertill?
      Tertill gets all its needed power from the sun. When there is sunlight—even on cloudy days—Tertill’s solar cell converts the light into electricity. The robot stores the energy in a battery. You don’t need to charge Tertill’s battery. Tertill uses its stored power smartly—during cloudy stretches, when less power is available, it patrols for weeds less often. Tertill is more aggressive during periods with more sun. Fortunately, weeds grow more slowly when they have less light.
      How many Tertills do I need for my garden?
      A single Tertill can maintain up to a 20 ft by 10 ft garden or about 200 square feet. If you have an unusually large garden (good for you!) you might get better performance with more than one robot.
      Will Tertill get stuck?
      Tertill’s four-wheel-drive and round body design minimizes the chance of it getting stuck, but it can happen. It is important to check on Tertill every few days, especially when you first set up your garden or after severe weather or watering. Should Tertill ever get stuck simply eliminate the obstacle and place it back down to allow it to continue to patrol for weeds.

      Why choose us?

      Tertill the weeding robot offers a risk-free 60-day return policy
      Risk-Free 60-Day Trial

      We hope you love Tertill as much as we do! If you are not entirely satisfied with your purchase, you have 60 days to return your Tertill from the date of purchase. We will refund 100% of the cost of Tertill plus any applicable sales tax and even pay for shipping Tertill back to us.

      Return Policy
      Tertill the weeding robot offers a 1-year limited warranty on all products and services used under normal conditions.
      1-Year Limited Warranty

      Tertill was designed by a team of world-class roboticists, including Joe Jones, the inventor of Roomba®. It has a full 1-year limited warranty which covers any product defects (failed motors, battery, etc.) that occur during normal use of your robot.

      Tertill the weeding robot offers free standard shipping in the US
      Free Standard Shipping

      All products include free standard shipping to the US. Faster shipping options are available for an additional fee. When product is in stock, they usually ship within 24 hours of placing the order. If we are out of stock, it will be longer.

      "This weeding robot will save you time and energy removing weeds automatically." 

      Ross Trethewey, This Old House

      "This little robot saved my aching back! My neighbor was so impressed he bought one too."

      Emerson L.
      No herbicides or plastic sheeting
      A better way to weed

      Tertill has two ways to kill weeds in your garden. First, by roaming over the garden ever day, its specially designed wheels scrub the soil, preventing many weeds from germinating. Then, if any weeds do manage to sprout, Tertill chops them down with its onboard string trimmer. Even if the weed sprouts again, Tertill will chop it down again and again until it runs out of energy and dies.

      See the big difference this little robot can make!

      Three-week time lapse of two identical gardens. They were planted with the same plants and then seeded with over 50,000 thousand weed seeds. The only difference is Tertill.

      "This robot is for everyone who loves gardening but hates the weeds. It's like a robot vacuum for outside. I think the most important part of using this robot is to watch the videos first. They give you a good introduction to how it works and how best to use it. I think this is an excellent tool. It saves time, effort, sweat, and muscle aches. I HIGHLY recommend it."


      “...in looking at the results of the hand weeded control group vs. Tertill with trimmer, the result is astounding. You are seeing as good weed control with Tertill as with the hand weeding effort.”

      Dr. Averill at the Cornell University School of Integrative Plant Science