Non-climacteric fruit is fruit that does not ripen after
harvest. All fruits and many vegetables and nuts are classified as
either climacteric or non-climacteric. Climacteric fruits will
ripen, i.e. get softer and sweeter after harvest. Non-climacteric
fruits, once harvested, never ripen further. The biochemical
process involved is that climacteric fruits give off large amounts
of ethylene gas whereas non-climacteric fruits give little or no
ethylene gas.
Some examples of climacteric fruits are apples, apricots,
avocados, bananas, blackberries, kiwi, plums, peaches, pears,
tomatoes.
Examples of non-climacteric fruits are citrus, grapes, cherries,
raspberries, strawberries and cashews.
These are just a few examples. There are many more fruits in
both categories.