"Plant a seed in her dirt hole and see what grows"
After a morning fuck session following a one night stand, you big spoon her while your dick recovers for another round. While recovering, you let it slip in her ass so she doesn't realize it till its too late. At this point, she either digs it or she bolts...either way, you win.
Travis was done messing with the broad, she needed to leave or let him put it in her ass so he gave her "the gardener"
A sexual maneuver where a person with diarrhea plugs his or her own asshole with their finger, as a gardener would plug a running hose with their thumb, dousing a fine liquid spray of fecal discharge all over the other partner's face and body.
Guy: I want to Cleveland Steamer you with a Golden Shower, babe.
Girl: No, I want your fine fecal spray all over my face. Give me The Gardener!
Guy: You got it! I had bad Mexican food earlier, here it comes!