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Alongside the garden that we see, there's an invisible garden. A garden of hidden signs and secret codes all designed to attract the attention of passing insects. That鈥檚 because insects can't see our world very well at all, but they can see ultra-violet. Take the honey bee. Many plants need the honey bee for pollination: no bees, no pollination and with no pollination there's no reproduction. So bees are actually a matter of survival for many plants. Because of this, flowers have had to learn to advertise themselves to bees in a way that bees can understand. A bee's view of the garden is very different, there are hidden patterns within all the flowers when looked at in ultra-violet light, like secret ink. The markings are caused by special compounds in the flowers called flavinoids. To the bees, they are like aircraft landing lights, guiding them in to the nectar and pollen at the heart of the flower.