North American Fruit Explorers mailing list at ibiblio

[Road's End Farm <organic87@frontiernet.net>]

Unless they form really deep in the soil, they would freeze out in my  
area. While things do seem to be getting warmer overall, the soil is  
always frozen during at least part of the period "between December and  
the end of February".



-- Rivka; Finger Lakes NY, Zone 5 mostly
Fresh-market organic produce, small scale


On Feb 16, 2011, at 9:06 AM, Hilborn.E@epamail.epa.gov wrote:

> "Hardy how far north, do you know?"
>
> I don't know. This was on the Truffle tree site.
>
>
>
>
>           The French black truffle (Tuber melanosporum), the truffle
>           species most widely and successfully cultivated, needs a
>           climate without extreme summer heat or extreme winter cold.
>           The truffles begin to form in the soil during the summer
>           when they are vulnerable to damage from high soil
>           temperatures and dry conditions. The truffles mature
>           between December and the end of February when they can be
>           damaged if the soil freezes around them.
>
>           These climatic requirements limit the areas where truffles
>           from southern Europe can be grown in North America to
>           southern parts of the Midwest, northern parts of the
>           Southeast, parts of the Mid Atlantic States and a long
>           strip along the West Coast in California, Oregon and
>           Washington. Other areas may be suitable, including parts of
>           Texas, Oklahoma, Idaho, and Southwest British Columbia. If
>           your area is not mentioned, but you feel that it has a
>           relatively mild climate, please contact us. We can look up
>           climate data from your region. In areas with marginally
>           acceptable climates measures can be taken to mitigate
>           microclimatic conditions, including mulching, increasing or
>           decreasing plantation density, choice of site aspect and
>           irrigation.
>
>
>
>
>
>
>
> I do not know if these are the same inoculum that Sharon used.
> Hardiness varies. May wish to speak directly with her.
>
> Contact: Sharon Day at 919-742-1200 or 919-623-3504.
>
> Betsy Hilborn