Sunday, January 16, 2011

Hello Sucker, Meet Mr. Felco

This past autumn, I noticed a sucker growing from the base of the Serviceberry (Amelanchier arborea) in our backyard border. There was a single leaf perched at the top of the shoot, and it looked decidedly unlike Serviceberry foliage. I vaguely remembered the previous owner of the property (who had planted the tree) mentioning that it was grafted to a rootstock of some other genus.


Amelanchier is relatively easy to graft, so easy that it will often graft successfully to other genus in the Rose family [1]. Judging by the thorns spiraled up the length of the sucker and the shape of the leaf, I'd say the root stock belonged to a Crataegus (Hawthorn) species.

How do I know this is a sucker of the Serviceberry, rather than a random Hawthorne seedling growing next to the Serviceberry?


You can tell a shoot is a true sucker by lifting away some of the soil or mulch from the trunk to see where the shoot is attached. In my case, the Hawthorne shoot is certainly growing out of the Serviceberry root stock.

Perhaps it's the plant geek in me, but I'm tempted to see what develops from this shoot. Could I actually grow an intertwined Hawthorne and Serviceberry? But I should probably remove the sucker. As Laura Hayden (from Durable Gardening) reminded me, the rootstock is likely giving the Hawthorn sucker preference over the established Serviceberry. The longer the sucker stays, the less vigor the Serviceberry will have.

While it looks like the local bunnies have already started to nibble the bark, I think I'll make a visit to the back border and introduce the sucker to the friendly Mr. Felco.

8 comments:

  1. Thorny Crataegus? Please do introduce it to Mr. Felco--these really are serious threats to eyesight in residential yards--they belong in woods IMHO!

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  2. Anne, I'll cut it down. I've come face to face with them in the woods, and I don't really want one in my yard. Although it is tempting. ;)

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  3. Fascinating. In the center of our town is a white crabapple / pink flowering cherry tree that is half and half. The rootstock and the scion have battled for years and the old thing now is a freaky two headed mix of two trees. Half is upright and half weeps... it's so weird. Your hawthorne - serviceberry might end up like that without the introduction of Mr. Felco!

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  4. Laurrie, I'd love to see a photo of your town's crab/cherry this spring in bloom. THAT would be fascinating.

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  5. Chris: there are pictures of the freaky apple / cherry in a post I wrote last spring:
    http://laurries.blogspot.com/2010/04/graft-and-corruption.html

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  6. Looking back at my old post, it's actually two cherry trees, a white flowering rootstock and a pink weeper, but I believe they are both prunus, not an apple root stock. Can you tell from the pictures? Looks more like cherry rootstock I think.

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  7. I would definitely say two cherry trees, from the bark and habit. Still pretty cool.:)

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  8. Thank you so much for this article. I didn't know such grafting was done. I have 8 serviceberry/hawthorne bushes that have puzzled me for 3 years, since I bought the house where they grow. They increasingly have two different kinds of leaves! Now in early spring, the serviceberry is starting to bud--but it is only 1/3 of the bush. The rest of the bush is still dormant. I don't know what to do about this. I hate to cut them down.

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