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Cultivars of Magnolia grandiflora and snow load problems.

16 years ago

I was wondering if anyone had experience with cultivars of Magnolia grandiflora and resistance to snow load damage. Okay, so after a late start, we just had our snowiest month ever (February). There was no freezing rain this winter but many of the snows were of a heavy, wet variety. I have read that cultivars of grandiflora that have broad, big leaves that lay horizontal are more prone to damage than those with leaves that are more vertically oriented. It sounds good in theory but I had just the opposite results. The cultivars with big, broad, horizontal leaves were fine while a variety with moderate sized leaves that are vertically oriented (believe it's a Teddy Bear) suffered most. The vertical leaves of the Teddy Bear seemed to accumulate much more snow and eventually snapped its branches. Here's what I found comparing the cultivars:

Little Gem--No Damage

Majestic Beauty--No Damage

Edith Bogue--No Damage

Victoria--No Damage

Green Giant--Some damage

Teddy Bear--moderate damage

What has your experience been? I like all varieties but am disappointed that the Teddy Bears seem to suffer so from heavy wet snow. Thanks in advance.

Comments (5)

  • 16 years ago

    No problems in the last 4 years with my Alta...takes a few days for it to spring back, but no damage.

  • 16 years ago

    I just attended the Magnolia Madness walk at the JC Raulston Arboretum where a similar question was addressed. The answer given was that "snow load tolerance was not a trait for which the breeders were currently selecting." Because of the nature of their native niches, these trees have not, as a species, staked their survival on high snow load tolerance.

    The best bet I would seek out would be an evergreen hybrid between the grandiflora and a species that originates from a region of higher altitude. The species from the higher altitudes may have potential adaptations in the structure of limb arrangement, or extended fibers in its wood, which may be carried into the next generation and make something visually close enough to what we are used to seeing; and, in the new tree, a structurally more adept organism.

    Please post a follow-up if a cross, as such, exists.
    ---Keith

    Here is a link that might be useful: JC Raulston Arboretum. Raleigh, NC

  • 16 years ago

    Here's the thing Keith. Most of the Grandiflora cultivars I have seem to deal with even the heavy wet snow loads--even those with characteristically broad leaves (aligned horizontally or even descending). I only had issues with one cultivar of moderate leaf size whose leaves where oriented much more vertically. I think it's the Teddy bear variety (has a rich cinnamon colored bottom). The snow just accumulated and was caught up in pockets that did not permit it to shed the weight of the snow so that eventually the branches would snap off. I had no problems with any of the following cultivars: Majestic Beauty, Edith Bogue, Little Gem, Green Giant or Victoria. It's an interesting question for further research. Even though these trees need not be adapted for heavy snow loads, I would think that they do have the issue with potential damage from freezing rain and ice storms (which are actually relatively rare here compared to heavy WET snow concerns). Thanks for the thoughtful response. PS. Latest weather woes have nothing to do with snow or ice, currently experiencing torrential rains and gale force winds.

  • 16 years ago

    I have a Teddy Bear that just survived its second winter and came through much better than the first. The snow accumulation last year was so heavy it was literally bent to the ground...I was sure it would die. But it came through with flying colors and although it did have the same heavy accumulation this year, had no bending or branches breaking at all. Granted, it's still quite small...6' or so. But for it to come through our foot of snow in January was impressive by the standards it set the first year!

    This tree is such an outstanding variety in other ways that I'm not as concerned about the snow shedding issue, although I agree it is worth consideration.

  • 15 years ago

    We are in SC so don't have the heavy snow loads but we do have ice! We have had very little damage from ice accumulation on Teddy Bear ® while all other cultivars of magnolias have NOT withstood ice accumulation well.