 In the 7th century, watermelons were being cultivated in India, and by the 10th century had reached China, which is today the world's single largest watermelon producer.The Moors introduced the fruit into the Iberian Peninsula and there is evidence of it being cultivated in Córdoba in 961 and also in Seville in 1158.It spread northwards through southern Europe, perhaps limited in its advance by summer temperatures being insufficient for good yields.