What to do this week: enjoy cut flowers and take photos When annuals and perennials, such as Nicotiana affinis and Lychnis coronaria, start to look unsightly, chop them and they may come back again. Prevent self-seeding Grab handfuls of spent pendent panicles of Stipa arundinacea (pheasant's tail grass) and tug them out gently before they drop their seed. Enjoy cut flowers Pick some late summer favourites such as shasta daisies and dahlias and put them in a vase for the house. They will last for ages. Camera time Before plants start to sag, take photographs of everything in the garden as a reminder for next year's planning.