Thalictrum 2011

22 posts / 0 new
Last post
Mark McD
Title: Moderator
Joined: 2009-12-14

RickR wrote:

Thalictrum kiusianum (Kyushu Meadow Rue) is a wonderful mat former, too.  Although it spreads rather slowly.  

Very nice Rick, you have a much larger stand than I do, looks great!  I haven't had it for years, but was given a plant last year, and even with this modest replenishment I've been enjoying the long season of bloom.  The fall color is good too!  I would advocate this as one of the top 100 essential rock garden plants, particularly for a half-shaded rock garden.

Mark McDonough
Massachusetts, USA, near the New Hampshire border USDA Zone 5
antennaria at aol.com
 

Lori S.
Title: Moderator
Joined: 2009-10-27

Beauties!  So well grown, all!  Despite our wet summer, I think all of mine would like more water still.
Here's Thalictrum 'Elin', apparently a hybrid of Thalictrum flavum var. glaucum and Thalictrum rochebrunianum:

Lori
Calgary, Alberta, Canada - Zone 3
-30 C to +30 C (rarely!); elevation ~1130m; annual precipitation ~40 cm

Mark McD
Title: Moderator
Joined: 2009-12-14

Lori wrote:

Beauties!  So well grown, all!  Despite our wet summer, I think all of mine would like more water still.
Here's Thalictrum 'Elin', apparently a hybrid of Thalictrum flavum var. glaucum and Thalictrum rochebrunianum:
[attachthumb=1]

Very nice... I have not heard of 'Elin', but given its parentage, I would agree that it looks quite intermediate between the two.  I think most of these tall thalictrums would be happiest alongside a partly-sunny stream in a meadow setting, they do crave water.

Mark McDonough
Massachusetts, USA, near the New Hampshire border USDA Zone 5
antennaria at aol.com
 

Lori S.
Title: Moderator
Joined: 2009-10-27

Yes, indeed.  This one does somewhat better in its spot... Thalictrum delavayi, one of the large-flowered ones like T. rochebrunianum though with finer foliage:
 

Lori
Calgary, Alberta, Canada - Zone 3
-30 C to +30 C (rarely!); elevation ~1130m; annual precipitation ~40 cm

RickR
Title: Moderator
Joined: 2009-09-21

And I grow both those species well, but my Elin died!

Rick Rodich    zone 4a.    Annual precipitation ~24 inches
near Minneapolis, Minnesota, USA

AmyO
AmyO's picture
Title: Member
Joined: 2009-12-06

Does anyone have a remedy short of nuking them for the little catarpillars that completley defoliate my T. rochebrunianum? They also do a number on all my Aquilegia. I've started using systemic granules to see if that will do the trick.

Amy Olmsted
Hubbardton, VT, Zone 4

RickR
Title: Moderator
Joined: 2009-09-21

I have plenty of problems with insect defoliation of aquilegia, but never had anything eat any of my thalictrum species or hybrids to the point of devastation, like they do with aquilegia.  In fact, they are one of the most pest free plants in the garden!

I just went out and took a poll in the garden.  These have absolutely no leaf insect damage in the shade garden:
T. kiusianum
T. thalictroides
T. flavum
T. dasycarpum
T. rochebrunianum Lavender Mist
T. filamentosum
T. ichangense

I also have T. aquilegifolium that is in full sun (don't ask me why 'cause I don't know).  About a tenth of it's leaves have part(s) eaten.

I'm sure we would all be interested in learning the results of your use of the systemic granules.  Any preliminary conclusions?

Rick Rodich    zone 4a.    Annual precipitation ~24 inches
near Minneapolis, Minnesota, USA

Lori S.
Title: Moderator
Joined: 2009-10-27

In previous gardening areas, if the leaves were being eaten by caterpillars that work outside the leaf, or even by leafminers, I found that manual squashing worked well... pretty satisfying too, if they are really bothersome.  ;)

Lori
Calgary, Alberta, Canada - Zone 3
-30 C to +30 C (rarely!); elevation ~1130m; annual precipitation ~40 cm

Hoy
Hoy's picture
Title: Member
Joined: 2009-12-15

I never experience defoliation of Thalictrums or Aquilegias. They are among the healthier plants here.
So is Astranta major. But I am at the lookout of something that can defoliate this one as it has become a pest plant in my garden >:(

Trond
Rogaland, Norway - with cool, often rainy summers  (29C max) and mild, often rainy winters (180 cm/year)!

AmyO
AmyO's picture
Title: Member
Joined: 2009-12-06

The defoliation happened earlier in the season and the plants have releafed out with flowers...the Aquilegia were worse, but are recovering now. I only treated the plants in pots and cut back all existing foliage. So I'll keep you up to speed if there is something good to report.
I'm using Marathon which is not available to the general public and can only be ordered through a wholesale nursery supplier, but I've been told that Bayer brand rose & flower systemic works really well on lily leaf beetles and other nasty critters, so it may work for these insects as well.

Amy Olmsted
Hubbardton, VT, Zone 4

Pages

Log in or register to post comments