Hi All!
In the graphs above, I do not want the first plot i.e. control separately but merged/overlaid on the other three plots. Here is the code I am using

ggplot(df,aes(x=Time2,y=T_leaf3,color=on_off))+
geom_point()+facet_wrap(~Irrigation)+
geom_line()+scale_x_continuous(n.breaks = 6)
Data looks something like this:
Thanks in Advance