Throughout history flowers have been an integral part of human survival and culture – as food, for medicine, to express feelings, as symbols, to commemorate and celebrate, and to decorate. Their shapes, colours, scents and textures have always attracted us, as they do animals and insects. Flowers are used as luxury spices (saffron), and as colouring and flavouring agents – marigolds fed to chickens make eggs more yellow and lavender was Elizabeth I’s favourite flavour of jam.