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Tuesday, August 12, 2014

No Fruit on Dwarf Orange

Q. I have a dwarf orange tree planted a little over a year ago. There have been no oranges on the tree. I have fertilized and I think I've been watering it correctly. The tree appears to be healthy, just no fruit. Any suggestions?

A. Dwarf orange is not much help to me. The subject of oranges is huge. I need to know what type of orange it is, whether it has produced flowers or not or if the flowers formed but failed to produce fruit. Varieties vary from early ripening - about 8 months from bloom - to late - up to 16 months from bloom.

There are three main groups: The normal fruited, without navels and with light orange colored flesh; the navel oranges, with a distinct navel development at the end; and blood oranges, with red flesh and juice.

There are about 73 varieties but US production focuses on Valencia, Washington Navel, Hamlin, Parson Brown, Pineapple and Temple. 

For home gardening there are many more than these six available from nurseries. Here is a publication from Arizona on citrus varieties.

extension.arizona.edu/pubs/az1001.pdf

1 comment:

  1. There is a newer citrus variety sheet that was put out in 2011 that has comments on more varieties of citrus (and other things):
    University of Arizona: Citrus and Deciduous Fruit Special Supplement
    http://cals.arizona.edu/maricopa/garden/html/general/CitrusSupplement2011.pdf

    I would assume "dwarfing" citrus means Flying Dragon or Cuban Shaddock rootstock, though there are others not commonly available in Arizona's restricted area. Either way, while it is possible for a 1 yr old citrus to produce some fruit, I would not be terribly concerned until its 4th year in the ground. Citrus take time to establish themselves.

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