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Oikos ECOS chestnuts: not hardy below -30F

Posted by nick_b79 4/5 Southeast MN (My Page) on
Sun, Jul 13, 14 at 12:18

Just thought I'd put this out there if anyone else was looking for the most cold-hardy hybrid chestnuts around (as I have been).

I planted two Oikos ECOS hybrid chestnuts about 5 years ago on my dad's farm, and just checked on them this weekend for the first time this year.

Last year, they WERE 8 ft tall and bore nuts the past two years.

Yesterday they were sticks in the ground, resprouting from the roots, winter-killed by the harsh winter we had in the upper Midwest this past year. My brother's best guess was that we hit -35F or even -40F once or twice (this was a few miles from Holdingford, MN, pretty much dead-center in the state). They were also in a somewhat exposed location, since my dad cleared out some dying trees in the windbreak.

I let my brother rip them out with the tractor. Oh well, I'll give the trees from Badgersett a try next time.

Follow-Up Postings:

RE: Oikos ECOS chestnuts: not hardy below -30F

  • Posted by bboy USDA 8 Sunset 5 WA (My Page) on
    Sun, Jul 13, 14 at 14:03

Nothing like a cold winter to make it clear what is hardy in a given area and what really isn't. There can be reasons other than variations in fashion and availability why you never see many kinds of trees and shrubs in older plantings.

RE: Oikos ECOS chestnuts: not hardy below -30F

  • Posted by beng z6 western MD (My Page) on
    Mon, Jul 14, 14 at 9:14

A couple of my small, weak 'Timburrs' were also killed to the ground (2 out of 3 are dead), but the largest, healthiest one shows no damage. Generally, these selections are disappointing.

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