[NAFEX] Anchorage of M7 vs M111 rootstock

Hélène Dessureault interverbis at videotron.ca
Sun Dec 7 15:15:41 EST 2008

What zone are you in and what size are your M111 (how tall when fully developed)? I have read that in colder zones trees on M111 stay smaller. 

Hélène, zone 3-4
  ----- Original Message ----- 
  From: jas39a at earthlink.net 
  To: North American Fruit Explorers 
  Sent: Sunday, December 07, 2008 2:06 PM
  Subject: Re: [NAFEX] Anchorage of M7 vs M111 rootstock

  My soil is not clayey (it's coarse-loamy, underlain by gravel).  I have trees on both M111 and M7.  Both have been satisfactory for me.  The M111 is somewhat more drought tolerant (a big concern in my case).  The M7 does sucker quite a bit with some scions.  Overall, I'd pick the M111 above the M7 for a general-purpose rootstock.

  Eddie Earles

    -----Original Message----- 
    From: Alan Haigh 
    Sent: Dec 7, 2008 9:35 AM 
    To: nafex at lists.ibiblio.org 
    Subject: [NAFEX] Anchorage of M7 vs M111 rootstock 

    After I wrote of the better anchorage of 111 over 7 Lucky wrote, "My experience has been just the opposite - I have a good clay soil with high water table; trees on M7 have anchored well and show no sign of leaning or blowing over, but easily 50% of my apples on M111 leaned at 45 degrees - or more - as they gained size, necessitating pulling them back into an upright position and propping up with sections of Osage Orange trunk."

    This surprised me not only because it contradicts my own experience but also my recollections of what I've read over the years of these 2 root stocks.  However, my experience does not include a lot of growing in clay soils, although I briefly had a nursery in a commercial orchard with very clay soil and many of the trees grown their by the owner (not my trees) on semi-dwarf rootstock required staking.  I'm going to contact the grower and see if he recalls the relationship with poor anchorage and particular root stocks.  It is most likely the staked trees were on M7 because commercial growers around here tend to use this stock more often for its relative precocity and greater dwarfing affect.

    The limited literature on my shelf seems to suggest both root stocks are relatively well anchored with a slight nod to 111 as superior in this regard but there's no mention of the affect of soil texture in the anchorage equation.  On separate issues 111 is rated far superior in light droughty soils and more resistant to crown rot in poorly drained ones.

    I hope some others will offer their observations on this subject.


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