A cheap bunch of roses from the supermarket can be transformed into a lovely table arrangement for a dinner party in just a few minutes. Place some soaked green oasis into a dish or a terracotta flowerpot and insert a candle into the centre. Cover the oasis with greenery from your garden, ivy and rosemary are ideal. You don't need any wire and can just insert the ends of the stems into the oasis. Cut the rose stems to 2 inches below the flower and insert into the oasis. A perfect center piece for a dinner party, costing only a few pounds!