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botanical name:
Citrus sinensis 'Washington Navel'
Citrus sinensis 'Washington Navel' © Deeproot Plant Base
common name:  Sweet Orange
synonyms:  Citrus sinensis 'Bahia'
family:  Rutaceae
characteristics: tree, evergreen, scented/aromatic
height: 9.00m
width: 6.00m
growth rate: medium
growth habit: rounded
leaf colour: dark green
flower colour: white
fruit colour: orange
stem/bark: brown
main season: All Year
edible symbol edible
aspect: full sun
conditions: dry soil, moist soil
preferred soil pH: any
minimum temp: 4°C
USDA zone: 11 to 11
description:
Very large, heavy, rounded, normally seedless juicy fruits of excellent sweet flavour. The skin has a slightly pebbly textue, is easily peeled and is rich orange in colour or somewhat paler when grown in sub-tropical areas. Often develops a small secondary fruit embedded in the apex, opposite the stem, sometimes protruding slightly and appearing similar to a navel.
Large bushy evergreen shrub or small rounded tree often with a slightly drooping habit caused by the weight of the fruits. Dark green leaves and very fragrant white flowers in spring. Sometimes has large thorns.

cultivation:
Not frost hardy and needs a mild climate or winter protection. May survive short periods of temperatures just below freezing. Will tolerate a very wide range of soil types, including very alkaline ones, but will not tolerate waterlogging. Trace element deficiency can lead to chlorosis.
May be grown in large containers. Watering should be done when soil is nearly dry, but it should never be allowed to dry out completely. Must have good sunlight and ventilation.
Fruits are normally harvested in winter, but will remain on the tree for a long time.

propagation:
From semi-ripe cuttings.

usage:
Very important variety for commercial growing. Planted extensively in California and Australia.
Can be grown as an ornamental conservatory plants.

other notes:
Uncertain origin, believed to have originated from a bud sport of a 'Selecta' orange, found in Bahía Blanca, Southern Brazil in the early 1800's. Imported into the United States in 1870.

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