Shipping Questions

We can only ship to addresses in the United States and Canada.

Orders received by 10am EST generally ship the same day; otherwise they will ship the following business day.

Returns and Exchanges

Robots purchased from Franklin Robotics come with a one-year limited warranty on the robot, which covers:

- Product defects (failed motors, battery, etc) that occur during normal use of your robot

- Manufacturing defects

The following are not covered:

- Defects caused by rough or inappropriate handling

- Damage caused by tampering with the sealed section of the robot

- Use of spare parts or other replacement items which are not provided or recommended by Franklin Robotics

- Non-compliance with the product instructions

- Willful or deliberate damage, neglect, or negligence

Please contact support@franklinrobotics.com with any questions.

Robots purchased from Franklin Robotics come with a 60-day, money-back satisfaction guarantee.  All products must be returned in good condition, in original box

How Tertill Works

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 can still keep short plants safe by placing provided plant guards around them until they are tall enough for Tertill to recognize. When Tertill approaches the guide, it will sense it and turn away.

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 patrols 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.

There needs to be at least a short barrier around your garden to keep Tertill from wandering away. The barrier might be a fence, edging that’s two inches or taller, 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.

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 one to two hours depending on the amount of sunlight available. To see Tertill’s stop and start motion in action check out our video.

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.

A single Tertill can maintain up to 200 square feet of garden. Examples are a 10 ft x 20 ft or 14 ft x 14 ft. If you have an unusually large garden (good for you!) you might get better performance with more than one robot. They play well together!

 It is important to check on Tertill every few days, especially when you first set up your garden or after severe weather to make sure everything is OK. Should Tertill ever get stuck, simply eliminate the obstacle and place it back down so it can continue to patrol for weeds. Tertill’s four-wheel-drive and round body design minimizes the chance of it getting stuck, but it can happen.