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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Prunus × cistena ( N.E.Hansen ) Koehne Prunus × cistena , the purple leaf sand cherry or dwarf red-leaf plum , is a hybrid species of Prunus , the result of a cross between Prunus cerasifera (cherry plum or myrobalan plum) and Prunus pumila (sand cherry). [ 1 ]
Renewal pruning. Spur pruning: Spur bearing varieties form spurs naturally, but spur growth can also be induced. Renewal pruning: This also depends on the tendency of many apple and pear trees to form flower buds on unpruned two-year-old laterals. It is a technique best used for the strong laterals on the outer part of the tree where there is ...
Prunus × cistena (purple leaf sand cherry), a hybrid of Prunus cerasifera and Prunus pumila, the sand cherry, also won the Award of Garden Merit. [16] [17] [18] These purple-foliage forms (often called 'purple-leaf plum'), also have dark purple fruit, which make an attractive, intensely coloured jam. They can have white or pink flowers.
The best time to prune a lemon tree is right after all the fruit has been harvested, which can vary depending on your USDA zone. However, it typically happens in later winter or early spring.
The following tree species and cultivars in the genus Prunus (family Rosaceae) currently (2016) [1] hold the Royal Horticultural Society's Award of Garden Merit. All are described as flowering or ornamental cherries, though they have mixed parentage, and some have several or unknown parents.
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Prunus cerasifera – cherry plum; Prunus cocomilia – Italian plum, cuckoo's apple; Prunus consociiflora [4] [5] – Hubei plum; Prunus darvasica – Darwaz plum; Prunus divaricata [2] – wild cherry plum; Prunus domestica – European plum; Prunus ramburii – sloe of Sierra Nevada (Spanish: endrino de Sierra Nevada) Prunus salicina ...