Bayer’s newest billboards are literally sprouting up around St. Louis. Two boards went up last week with depictions of the iconic Gateway Arch planted in greenery—kale, collard greens and chard, specifically.

The white background bears the single phrase “St. Louis, let’s grow together” along with a Bayer logo in the left-hand corner to herald the close of the German drugmaker's Monsanto acquisition. St. Louis, the former headquarters of Monsanto, now becomes Bayer’s largest site in the U.S. with some 5,500 employees, eclipsing the previous largest Bayer office in Whippany, New Jersey.