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Five types of rootstock predominate in temperate climates where cold or freezing weather is not probable, especially Florida and southern Europe: A double graft union of diamante citron upon sour orange rootstock. Sour orange: the only rootstock that truly is an orange (the Citrus × aurantium or bitter orange). It is vigorous and highly ...
Like the rangpur, it is a cross between mandarin orange and citron. Rough lemon is a cold-hardy citrus and can grow into a large tree. The rough lemon is mostly rind, making it less edible than other citrus. As a result, the rough lemon is mainly used for citrus rootstock, [1] however areas of South
Ponderosa lemon is not widely grown commercially, but it is commonly grown as an ornamental plant. In areas where the winter's cold may damage the plant, they are grown in containers. In such cases they are usually grafted to dwarf rootstocks to help maintain a smaller, more manageable size. The impressive sized fruits may be left on the tree ...
Citrus tamurana: Hyuganatsu (Citrus tamurana, Japanese: 日向夏) is a citrus fruit and plant grown in Japan. The name comes from Hyūga, the ancient name of Miyazaki Prefecture in Kyushu, where the citrus is said to have originated, while "natsu" (夏) means summer.
Citrus × meyeri, the Meyer lemon (Chinese: 梅爾檸檬; pinyin: méiěr níngméng), [1] is a hybrid citrus fruit native to China. It is a cross between a citron and a mandarin/pomelo hybrid. [2] Mature trees are around 6 to 10 ft (2 to 3 m) tall with dark green shiny leaves. The flowers are white with a purple base and are fragrant.
It is resistant to citrus tristeza virus and exocortis but is sensitive to root asphyxia and Phytophthora. [2] [4] One of the down sides to using the rootstock is it grows slow in the early years. In the right conditions it can induce high productivity and excellent fruit quality, although these are usually somewhat smaller than with others.
Citrus plants hybridize easily between species with completely different morphologies, and similar-looking citrus fruits may have quite different ancestries. [3] [4] Some differ only in disease resistance. [5] Conversely, different-looking varieties may be nearly genetically identical, and differ only by a bud mutation. [6]
The leaves are elliptical in shape and the flowers have five white petals. [2] It is hardy to USDA zone 9. [4] The tree is fast-growing and adaptable to many soil conditions. It is not susceptible to tristeza virus, exocortis, or xyloporosis viroids, but is susceptible to citrus nematode and phytophthora root rot but less so than the rough ...