Romantic aliens, talking hills and riddling rhododendrons - the week in art

Nathan Coley places neon signs in Sussex, Edinburgh goes botanical and Dominique Gonzalez-Foerster gets cosmic in London - all in your weekly dispatch Dominique Gonzalez-Foerster: Alienarium 5A futuristic installation that brings this artist's style of image overload to bear on the pressing question: what if aliens fell in love with us? Serpentine South Gallery, London, until 4 September.