Spring

Love it when this arrives in season.

Courtesy of a Yorkshire rhubarb producer's website:
2,700BC - earliest evidence of rhubarb in diet
Medicinal use - gut, lung, liver
Asia to Europe - Marco Polo
15th century - first sowing in Britain - wrong strain
1657 - rhubarb selling at 3x price of opium in England.
1817 - accidental discovery of 'forcing' at Chelsea Physic Garden
1877 - first Yorkshire producer established