Arum hygrophilum, Asarum maximum and A. nobilissimum

Tony Avent
Tue, 30 Mar 2010 11:37:46 PDT

I helped a friend move from Southern Minnesota (Zone 4b) last year and he
was growing several great Asarum species including A. takoi, A. debile, A.
nipponicum, A. sieboldii, and more that I can't remember.  His area had
inconsistent snow cover, so these were regularly subjected to -15F. 

Tony Avent
Plant Delights Nursery @
Juniper Level Botanic Garden
9241 Sauls Road
Raleigh, North Carolina  27603  USA
Minimum Winter Temps 0-5 F
Maximum Summer Temps 95-105F
USDA Hardiness Zone 7b
phone 919 772-4794
fax  919 772-4752
"I consider every plant hardy until I have killed it least three
times" - Avent

-----Original Message-----
From: []
On Behalf Of Jim McKenney
Sent: Tuesday, March 30, 2010 1:35 PM
To: 'Pacific Bulb Society'
Subject: Re: [pbs] Arum hygrophilum, Asarum maximum and A. nobilissimum

Thanks, Tony, I'll keep that in mind.

When I buy plants, I'm one of those "one of each" guys (I think I can hear
Jane laughing now). I grow them under controlled conditions until I learn
how to grow them and can propagate them; then I move some into the open

There has not been a good track record with either wintergreen Arum or
evergreen Asarum here so far in the open garden. Deciduous asarums thrive;
evergreen asarums eventually disappear. It might take ten years, but
eventually they go. I've tried various species from eastern North America
and various Asian species. I've never known them to thicken up into handsome
clumps here. I have friends only ten miles away who do well with both
genera, but there is something about my garden which evidently does not suit

I notice that when we bring up the topic of these marginal plants, there are
rarely positive responses from north of here.

Here in the greater Washington, D.C. area there is a strong NW to SE
gradient in climate superimposed over the broader SW to NE zone 7
conditions. Gardens to the SE of my garden evidently experience much milder
winter conditions based on the performance of marginal plants. 

Jim McKenney
Montgomery County, Maryland, USA, 39.03871º North, 77.09829º West, USDA zone
7, where Fritillaria raddeana is blooming handsomely. 
My Virtual Maryland Garden BLOG!
Webmaster Potomac Valley Chapter, NARGS Editor PVC Bulletin 
Webmaster Potomac Lily Society

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