There’s a new robot that can weed your garden.

The Tertill was designed to survive outdoors. The latest prototype uses four-wheel drive to navigate a variety of terrains unsupervised and inward-tilting wheels so the robot can grip surfaces and extricate itself when it drives onto rocks and into holes. The Tertill also relies on capacitive sensors, which help it avoid obstructions and understand when to activate its weed-whacker.

The mechanism functions without machine-vision software, which Franklin Robotics says is not yet robust enough to distinguish weeds from plants, at least not at an affordable price. When the Tertill rolls over a plant that is shorter than its one-inch-high bumper, it assumes the plant is a weed, activates its trimmer, and cuts it. It turns away from plants that are taller than its bumper, and from metal collars that should be installed to protect seedlings.

By the time the Tertill goes on sale—likely via a crowdfunding campaign—the robot will have two more garden-related capabilities. It will wirelessly transmit data about plant and soil health to owners’ smartphones, so they can improve their gardens, and it will repel foraging animals such as rabbits and squirrels by moving and making noise when they approach.