Re: CULT: Nebraska summer rot resistance?

Gary White, Lincoln NE    zone 5 said:
<Rot has not been a big problem for me here in Nebraska.......But, with
all this rain, I will be checking to see if anything succumbs to it in
the next few weeks.>

Thanks Gary - you have a wonderful opportunity to look for survivors
with the soaking following drought <g>

<The bigger problem for us here in Nebraska is Scorch.  ...Last year, I
lost about 50 clumps to scorch, even including about 4 beardless iris
clumps.  ...And, with scorch, it appears to be completely at random.  We
have had one clump of a cultivar succumb to Scorch, with another clump
of the same cultivar a few yards away continue growing perfectly
normally.>

Did you see the long review of Scorch research in the last (?) AIS
Bulletin?  What did you think of it?  I got the impression that they had
about concluded that "scorch" was most often due to late freeze damage
stress, often followed by soft rot.  I can believe that two clumps of
the same cultivar would respond differently to stress, especially if
it's not a particularly tough cultivar.

I'm curious, if you have time, which TB cultivars you lost.

<There are a couple of hybridizers of Tall Beardeds in the Lincoln
area.  One is Allan Ensminger.  ....Allan also introduces wonderful Tall
Bearded irises that are not broken color irises.>

Of course!  How could I forget - apologies...  I wonder how his TBs do
in our southern heat and humidity?  I don't recognize any of the names
as ones I've seen grown in this general area.  Walter, Janet, Bill,
others in the soggy humid southeast - have you tried any of the ones
Mike mentioned? (JOY JOY JOY, GLADYS MY LOVE, SOLOMON'S SEAL, SINGS SO
SOFTLY)

<Allan believes that his mix of fertilizer is what had nearly eliminated
rot in his beds.....he felt that the high sulfur content in this mix,
mostly coming from the Gypsum was what prevented rot in his beds. >

I wonder how much benefit comes from the calcium in gypsum and how much
from the sulfur.  Depending on the season, I still see some rot,
especially in new plants not suited to my garden, but I certainly agree
that the fertilizer mix is really important and it is different in
different climates and soil types.  I've been adding a lot more crushed
limestone & higher phosphorus the last two years & plants seem healthier
than in the past when I was using 10-10-10 or even 6-12-12.

Thanks Mike.
--
Linda Mann east Tennessee USA zone 7/8

Tennessee Whooping Crane Walkathon:
<http://www.whoopingcranesovertn.org>
American Iris Society web site <http://www.irises.org>
iris-talk/Mallorn archives: <http://www.hort.net/lists/iris-talk/>
iris-photos/Mallorn archives: <http://www.hort.net/lists/iris-photos/>




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