Speaking to HuffPost UK, Guy Barter, Chief Horticulturalist at the Royal Horticultural Society (RHS), said bletting “is an extreme form of ripeness on the cusp of decay, some say slightly decayed, so medlar fruit goes soft and slightly fragrant, becoming palatable – acquired taste is the usual term”.
Article source: https://www.huffingtonpost.co.uk/entry/bletting-fruits-uk_uk_6a8844b9e4b021f20f8859e7