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Shrubs under black walnut

Posted by shadey z5 Chicago (My Page) on
Sun, Apr 10, 05 at 23:16

I have 3 canadian hemlocks which were planted in a straight row and look sort of silly since the rest of the area is sort of natural. I am looking for a companion plant (shrub) to plant near them sort of around them -- but scattered -- to make them look more natural and blend in to a woodsy type of environemnt.

Problem -- these Hemlocks are at the dripline of a Black Walnut.

I had purchased 5 Red Chokeberry to intersperce w/ the Hemlock and they looked great since they are tall and whispy and would not overpower the Hemlocks. Problem is, I learned they are sensitive to Juglone and I had to move them.

I can't seem to think of anything that will look as nice -- natural and woodsy -- to plant with the hemlocks that is also tolerant to Juglone.

ideas?

Shadey


Follow-Up Postings:

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RE: Shrubs under black walnut

Native plants of the genus Viburnum arnt usually affected so i hear


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RE: Shrubs under black walnut

Japenese maples are a great companion to the BWT. You can buy varieties that are more mounding and shrub like in appearance. Forsythia is another

Walnut


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RE: Shrubs under black walnut

Dogwoods (red and yellow twig) and, Fledgeling, you're correct about Viburnum. I have dogwoods under mine, Viburnum and also Caryopteris (LOVE THEM!). The Caryopteris will die back partially in our zone, shady, but they pop back quickly in the spring, I'm a huge fan. Umm...let's see...I also have Weigela that seem to be unaffected, as well as Elderberry. FWIW, there's my two cents! :)


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RE: Shrubs under black walnut

I'm surrounded by 9 BW trees. Search the internet for juglon toxin or Black Walnut tolerant plants. There are a large number of them.

If you want blooms, hydrangea macrophelia (big leaf hydrangea) are reported tolerant. Not all varieties may apply. For sure the hydrangea aboracens (native species) is tolerant, and I have this planted between two Kerria shrubs just beneath a BW tree. I'm also testing oak leaf hydrangea. It has lived since last spring and I see signs of life. Of course, if you can place them so they get good sun exposure, rugosa roses and hybrid rugosas will grow and bloom beneath BWs.The varieties I have within the drip lines are Rose rugosa rubra, Therese Bugnet, Marie Bugnet, Charles Albanel, Conrad F. Meyer and Rugelda. The latter two need spraying for fungas.

I'm currently testing hybrid musk roses and multiflora hybrids. It is too soon to report success.

Hosta will grow in the shade of these trees as will some ferns. Also spider warts, foam flower, ligularia and toad lilies.

The list goes on and on. You may not find them too restrictive after all.

Oh, not all Viburnums are tolerant, but one of the best is listed, Viburnum carlise or Korean spice viburnum.


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RE: Shrubs under black walnut

I would like to plant some clethra (clethra alnifolia), sargent viburnum (viburnum sargentii), and diervilla lonicera under my black walnut trees this spring? Does anyone know about their tolerance? I am ready to order them but hesitating. Thank you.


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RE: Shrubs under black walnut

I have rose of sharons and wild blackberries, and orange daylilies under black walnuts, and have had for years, so I know those are ok.


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RE: Shrubs under black walnut

I don't think clethra or sargentii viburnum are tolerant. Arrowwood and blackhawk viburnam and the beautiful carlisi or Korean Spice Viburnum are on the lists of tolerant plants. Also I've seen spirea and deutzia mentioned as tolerant. Big leaf hydrangea (macrophelia?) are tolerant.

There are plenty lovely plants that will work. Do the search and check all lists. They vary.
Yes Rose of sharons and blackberries and daylilies are all tolerant. So are siberian irisis


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RE: Shrubs under black walnut

Are you sure blackberries are tolerant, not black raspberry (which I'm pretty sure is tolerant)? I'd love to do blackberries in my yard, and have space by my BW still.

Anyone ever try the honeysuckle Lonicera periclymenum Harlequin? I just ordered one from Parks, and am hoping to place it quite close to the BW (Lonicera sp and other lonicera varieties are on many of the tolerant lists).

Thanks!


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RE: Shrubs under black walnut

I went ahead and ordered clethra (clethra alnifolia), sargent viburnum (viburnum sargentii), and diervilla lonicera, but it sounds like I'll have to plant them somewhere else. Thank you for the information and for the other suggestions. I had planted a pagoda dogwood under one black walnut last fall and see that the rabbits girdled it -- I think I'll replant it as a trial. Any more shrub suggestions? Thank you.


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RE: Shrubs under black walnut

Lisaloo, you are right. The blackberry is not listed but I believe the black raspberry is or perhaps the wild raspberry. I see plenty of them sprouting up around the BW tree across the street.

With the hybrids and related cultivars, it is certainly worth a try to check for tolerance. I am trying oak leaf hydrangea around mine since the big leaf hydrangea is listed as tolerant. So far so good.

Sue Minn, I believe the cornus altinfolia(?) or pagoda dogwood is a tolerant plant. I know the red twig dogwood is listed.


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RE: Shrubs under black walnut

I did not have luck with oakleaf hydrangea near black walnut. It could be they died for other reasons: we have very dry summers and I don't have a sprinkler system. I lost three. I tried in another spot and now have a large healthy shrub.


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RE: Shrubs under black walnut

hi all,

any thoughts on SERVICEBERRY under black walnut-- I have been looking around the web, and have seen serviceberry listed as both tolerant and intolerant. any first hand experience out there that you can report?


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RE: Shrubs under black walnut

My V. tomentosum (doublefile viburnum) IS susceptible to the juglone.


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RE: Shrubs under black walnut

Does anyone know if purple smoke bush is okay near black walnut?


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RE: Shrubs under black walnut

I'll ask the same question as bekcgarden. The Black Walnut tree of my neighbor's I've coped with for years and between the toxic root system and the squirrels it attracts to their property and my own I'd just love to see the hideous thing gone.
Since it's not my tree to chop down, I will say the shrubs at the drip line on either side of the fence are not languishing nor in peril it seems yet ....
By virtue of the fact that it is menacing, how about a metal sheet barrier driven down in the soil to block the roots from harming vulnerable plants?? Hate that tree!


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