North American Fruit Explorers mailing list at ibiblio

[Lucky Pittman <lucky.pittman@murraystate.edu>]

At 08:43 AM 4/30/2009, Mark wrote:

> Another
> question.  Does frost/freezing damage/kill the new
> grafts?

I have had numerous pecan/walnut grafts, done early in the season, which
had already initiated growth, killed by a late spring freeze(and it was
not the Easter Big Freeze Disaster of 2007).  Can't recall what any
apple/pear grafts might have done that year, but I'm thinking they
probably were not significantly harmed.
It could be that the nut tree grafts had not yet callused in, and were
expending stored reserves in the body of the scion to push growth, and
did not have enough wherewithall to reinitiate growth from secondary or
latent buds.

Lucky Pittman
USDA Cold Zone 6
AHS Heat Zone 7
Hopkinsville, KY