Plum jam jamie oliver

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A plum is a fruit of some species in Prunus subg. Plums may have been one of the first fruits domesticated by humans. Ibn al-‘Awwam’s 12th-century agricultural work, Book on Agriculture. Plums are a diverse group of species. The tree is of medium hardiness.

The flesh is firm and juicy. The fruit’s peel is smooth, with a natural waxy surface that adheres to the flesh. The plum is a drupe, meaning its fleshy fruit surrounds a single hard fruitstone which encloses the fruit’s seed. Percentages are roughly approximated using US recommendations for adults.

Japanese or Chinese plums are large and juicy with a long shelf life and therefore dominate the fresh fruit market. They are usually clingstone and not suitable for making prunes. They are cultivars of Prunus salicina or its hybrids. Flowering starts after 80 growing degree days. If the weather is too dry, the plums will not develop past a certain stage, but will fall from the tree while still tiny, green buds, and if it is unseasonably wet or if the plums are not harvested as soon as they are ripe, the fruit may develop a fungal condition called brown rot. It is juicy and can be eaten fresh or used in jam-making or other recipes. Plum juice can be fermented into plum wine.

In central England, a cider-like alcoholic beverage known as plum jerkum is made from plums. As with many other members of the rose family, plum kernels contain cyanogenic glycosides, including amygdalin. Prune kernel oil is made from the fleshy inner part of the pit of the plum. Romania and Serbia were secondary producers.