Literal translation
on the way down, the pumpkins go there too
Meaning
anyone, even the dullest, can manage an easy task
Explanation
Said of something so easy that even the least gifted manage it, with a hint of contempt for those who follow the crowd without thinking. The squash, a lowly vegetable with a somewhat ridiculous look, often serves as a disparaging image in Provençal. What rolls goes downhill on its own, while climbing takes effort, an obvious point reinforced by the fact that Provence is a land of relief where what comes from above, literally and figuratively, tends to be viewed with suspicion.