Trees mentioned in the Koran
There are four trees mentioned in the Koran as present in Paradise: the fig tree, the olive, the pomegranate and the date palm. Whether these grow well in Britain depends on how warm and sheltered is their location and how well they are cared for.
Sometimes outdoor fig trees bear fruit even in northern England. Sometimes they grow but bear no proper fruit or do not even survive. Pomegranates and olives can bear fruit in the London area, given good conditions. For these plants you need to find out about the right conditions and consider whether your site could supply these.
For Prince Charles’ Carpet Garden, fig, pomegranate and olive trees were planted because of their mention in the Koran. But date palms were thought to be unsuitable for the location.