concrete bolck

Using concrete blocks to edge some soil but 2 full blocks would be to high. I'm using 440x215x100mm. Can i cut length ways & mortar them on top to finish it off? Would it be ok & look ok like that?

re the right hand black line on the wall drawn over the crack with a thick permanent marker; the lintel below that cracked wall is redundant, the opening that required the lintel is now blocked up but still not rendered (image), there doesn't appear to be a corresponding vertical crack in the...