Everything's gonna be all white

My plan for an all white (and green obv) garden took a bit of a detour last year when, planted from scratch, I went a little bonkers with bargain buys and poundshop swag.    I really have no restraint when I see something cheap, it's an illness.   

Anyway, I'm back on track and we're going to crowd the colour out with monotone this year.    Apart from the paeonies and roses which are already in and are not negotiable.