[Trillium-l] Trillium research
2csh at bellsouth.net
Fri Jan 16 23:29:25 CET 2015
Robin: Fred Case noted in his book (comments, p. 179) that repeated freezing
kills T. decipiens in northern gardens because it comes up too early. I
guess the relatively "mild" freezes we get in north Georgia are tolerated by
the plants. I suspect that the same would be true for the T. underwoodii
that hail from the most southern area near where Florida. Georgia and
Alabama come together, as those are even earlier for me than decipiens.
However, I see no similar comment for underwoodii in Case's book.
However, underwoodii also grow north of that location in east central
Alabama which is considered the Piedmont, higher altitude and further north
than the southern coastal plain locations in or near the Florida panhandle.
My guess is that the plants he gave you were from this part of Alabama, and
I have noticed that my underwoodii from the Alabama Piedmont are distinctly
later to come up and to bloom than the more southern ones, which means they
are likely to be exposed to less winter up north. A clue from the book is on
p. 237 where he says: "Blooms near Clanton, Alabama in early to mid April".
If you look at the attached map, you will see the Piedmont area of Alabama
as a green triangular shaped area in the eastern central part of the state.
Clanton is near the western tip of that green triangle, and if I were a
betting man, I would wager Case got a few plants from there and that is what
you have. I know of no decipiens that grow in the Alabama Piedmont area.
Smyrna, Georgia USA z7
From: trillium-l-bounces at science.uu.nl
[mailto:trillium-l-bounces at science.uu.nl] On Behalf Of Robin Graham Bell
Sent: Friday, January 16, 2015 4:42 PM
To: Trillium Enthusiast Discussion List (and other Woodland plants)
Subject: [Trillium-l] Trillium research
Hi Charles, Maybe you can answer this question for me. Several years ago I
visited Fred Case & during that visit he offered me some T. underwoodii from
his garden.......I'd been relating my difficulties with southern T's in zone
5 Ithaca NY. He said his were perfectly hardy in his Michigan garden & I
could dig some from his clump. I did, of course, immediately, & they grew &
flowered perfectly well in my Ithaca garden. But he didn't tell me where
they came from, I forgot to ask in my haste to put his offer into effect
(joking, just forgot to ask). They certainly look to me like underwoodii & I
have no reason to doubt him, but is there any more northerly population that
could take US zone 5 as these clearly did in Michigan as well as NY?
Alternatively, maybe they are all hardier than you think? Although, my own
experience with others, decipiens, for example, makes me wonder what the
exact issue might be. The problem with the decipiens was that they emerged
too soon & the shoot
s were repeatedly frozen into oblivion. The rhizome could clearly survive
the winter, but not the too- early emergence.
Robin Bell, Medford, OR. zone 7+.
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