cold hardiness of gisela 6

windfall_rob(vt4)February 5, 2013

Any one have any good info on the average cold hardiness of the gisela 6 rootstock?

I spent a little time this morning but couldn't come up with anything specific.

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fruitnut Z7 4500ft SW TX

Gisela 5 and 6 are considered very hardy. I'm not sure they are zone 4 hardy but they are supposed to be hardier than Mazzard. No damage after -18 in WA. But that's not -20 to -30 of zone 4.

    Bookmark   February 5, 2013 at 9:36AM
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dmtaylor(5a (WI))

With global warming, I'm not sure if Zone 4 exists at all anymore in the continental U.S. ;)

Seriously, though, Gisela rootstocks are hardy to at least Zone 5 if not Zone 4.

    Bookmark   February 5, 2013 at 11:27AM
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That is quite helpful. If hardier than mazzard it should be OK for all but the most extreme of our test winters...they certainly seem to be less of a test than they used to.

Our loss of consistent snow coer actually has me more worried about rootstock hardiness than I used to with the occasional deep dip in temp....that wasn't so bad with 20+" on the ground. Whole different story with nothing but a dusting.

    Bookmark   February 5, 2013 at 6:56PM
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franktank232(z5 WI)

Past couple of years I haven't been able to put my Gisela 5 fruit buds to the 2009 (they were just very young trees then), we had -26F in Jan... they are still alive today.

    Bookmark   February 6, 2013 at 1:17AM
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