Plant-o-bot

Plantobots were a type of mechanical plants that could be engineered to grow a on planetary environment.

Fiction

Generation 1 cartoon

According to the Quintesson Journal, after enhancing primitive worlds with advanced technology that secretly produced heavy pollution that would result in chemical rains that destroyed the planet's native vegetation. After which the Quintessons would offer their "aid" by producing plantobots for a price. TQJ

From Teletraan I: The Transformers Wiki, a Wikia wiki.