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I am interested in knowing what is a known close relative to citrus, that is known to grow in the northeast US, such as western New York. Does anyone have any recommendations?

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  • I'm guessing from your choice of tags that you intend to graft them/use them as a rootstock. Note that cold will still affect the scions, if you choose a sweet-fruited citrus scion.
    – J. Musser
    Aug 13, 2014 at 1:35
  • correct 1 to see if I can 2 for the novelty of having such a tree in the yard.
    – Bob D
    Aug 14, 2014 at 1:08

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The coldest area in western New York gets down to about -25° Fahrenheit, so no true citrus will survive. The closest you'll get is Trifoliate Orange, Poncirus trifoliata. This plant can inter-graft and hybridize with Citrus species, but is inedibly bitter. It is an extremely thorny plant. It's leaves are compound and deciduous. It is hardy to -22° Fahrenheit. They can get up to about 25 feet tall in warmer areas, up to 8-10 feet in the coldest parts of it's range.

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  • Next question is when I get a root stock which way to graft is recommended? I'm not certain to how the graft should be done on this root stock.
    – Bob D
    Aug 20, 2014 at 2:29

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