Commercial English Walnut plants are proprietary, but some have been
described in the literature. For example:
Common English walnut hybrids = Juglans hindsii x Juglans regia
Paradox (disease resistant) = Northern California black (Juglans
hindsii) x English walnut hybrids (Juglans hindsii x Juglans regia)
In any case they use several varieties because best production is
achieved by cross-pollination.
By the way Butternut, also known as "white walnut" is the hardiest of
the walnuts, withstanding lows near -50° F ("warm" end of zone 2).
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Cheers, Steve Henning in Reading, PA USA
I have 2 English walnuts (northern Delaware), about 20 years old, and
never get nuts. They fall before mature and squirrels eat when
immature. I've tried spraying and wrapping with squirrel deterents to
no avail. Squirrels will jump maybe 10 ft between trees. Sorry I grew
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