How to leave in a boxplot in R, all x-axis values written in the chart?

I am plotting a boxplot type chart in R, but some values it is omitting. There is only the little dot on the x axis for the boxplot, but the name of that boxplot does not appear. I believe it is due to the amount of boxplots that exists within the chart. Does anyone know how to solve it? I'm plotting like this:

boxplot(dados$Peso ~ dados$Idade,
        xlab='Times (hours)', ylab='Weight (grams)',
        outline=F)