[NAFEX] scion rooting
Lon J. Rombough
lonrom at hevanet.com
Wed Apr 22 20:46:07 EDT 2009
I'll add something too. I later tried putting a wire around the tree
at or near the graft union before burying the union. As the tree grows
the wire slowly girdles the tree forcing it to root. Haven't dug those
trees up to check, but they did grow to larger sizes, suggesting the
scion had rooted.
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On Apr 22, 2009, at 5:35 PM, Mark Angermayer wrote:
I should add, I used to plant all my trees with the graft below grade,
for various reasons. I haven't checked them all, but some of the
apples I've dug up and moved had roots above the graft. Peaches never
do. This behavior of peach was confirmed by Illinois fruit specialist
> ----- Original Message -----
> From: Mark Angermayer
> To: North American Fruit Explorers
> Sent: Wednesday, April 22, 2009 7:22 PM
> Subject: Re: [NAFEX] scion rooting
> Very interesting thought Alan. Can you explain the mechanics a bit
> more? Is he saying roots simply won't form above the graft? I have
> found this true on peach (in other words peaches most definitely won't
> form roots above the graft) but found roots will form above the graft
> on apple and plum.
> essage -----
> From: Alan Haigh
> To: nafex at lists.ibiblio.org
> Sent: Wednesday, April 22, 2009 5:12 PM
> Subject: [NAFEX] scion rooting
> As I was examining some root growth today off of some seedling apple
> trees I started thinking about the issue of scion rooting off of too
> deep planted trees. In Harold Tukey's book "Dwarfed Fruit Trees" he
> wrote something that I found very surprising and that was that the
> vast majority of apple varieties to not tend to dedifferentiate cell
> structure to where root primordia will form from non-root tissue. In
> other words- planting apples below the graft rarely leads to a loss of
> dwarfing from the rootstock as a result of scion rooting.
> This contradicts so much of what I've read over the years but Harold
> Tukey was clearly well qualified to make his statement and wouldn't
> have done so if he wasn't quite sure it was valid. I have seen at
> least one fairly large commercial orchard where many of the M7 and 106
> trees were planted below the graft union to no apparent negative
> affect- 13 foot spacing between trees- 20 ft between rows.
> Thought I'd throw this out there to open a discussion. I know some
> varieties of apples easily root out from scion wood such as Northern
> Spy which create root primordia all over the branches but I was
> wondering if others have observed scion rooting as being extremely
> He also stated in this book that early American pear growers outside
> of Boston used to make quince work in their cold climate as a
> rootstock for pear by planting it deep enough to be insulated from
> winter cold. Another case where scion rooting was apparently not a
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