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Amsonia hardiness
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Posted by coolplantsguy z6 Ontario (My Page) on Mon, Jan 18, 10 at 12:06
| I know 2010 has just begun, but Amsonia hubrichtii (Threadleaf or Arkansas Amsonia) has been selected as the 2011 Perennial Plant of the Year.
I have not grown this plant in my own garden, although have seen it in others around here. I'm curious as to your experience regarding its true hardiness, as sources seem to state considerable variation. Some say to zone 4, others only to zone 6.
Thanks in advance. |
Follow-Up Postings:
RE: Amsonia hardiness
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It will probably be okay in your zone, but it will be dicey here in zone 3.
If I get germination, I will be placing the hubrichtii up nearer the house.
The tracheamontana variety is hardy to zone 3 according to my searches.
I am doing these as a wintersow.
Caroline zone 3 Calgary |
RE: Amsonia hardiness
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- Posted by xaroline zone 3 Calgary Canad (My Page) on
Mon, Mar 1, 10 at 8:17
Ansonia hardiness is discussed in "A book of Blue Flowers"
by Robert Geneve (Timber Press).
He says the amsonia tabernaemontana is hardy to -40ºC (-40ºF)
and the other species to -29ºC ( -20ºF).
So I may luck out with hubrichti and jonesi as well as the tabernaemontana.
I have done them as a winter sow. |
RE: Amsonia hardiness
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| I found the first year to be our big challenge.I am a zone 4-5 in northwest Montana.In the colder years if not established it died off.In our warmer years it did real well and as it established it has grown into some nice plants.Not sure if this helps since I am right in the center of the zones listed. |
RE: Amsonia hardiness
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We shall see---it will depend on the kind of springs we experience.
I will post my experiences---but I do not expect flowers until year two. |
RE: Amsonia hardiness
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I am zone 5a. I've had it live thru the last 2 winters .
Karen |
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