Collingwood Ingram, born in 1880, became known as 'Cherry' for his defining obsession. As a young man, he travelled to Japan and learned of the astonishing displays of cherry blossoms, or sakura. On a return visit in 1926, Ingram witnessed frightening changes to the country's cherry population. A cloned variety was sweeping the landscape and being used as a symbol for Japan's expansionist ambitions. Determined to protect the diversity of the trees, Ingram began sending the rare varieties from his own garden in England back to Japan with the help of a network of 'cherry guardians'. This is an eloquent portrait of an extraordinary man whose legacy we enjoy every spring, and his unsung place in botanic history.