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Re: Germination (was digest on photos)

  • Subject: Re: Germination (was digest on photos)
  • From: Linda Mann <lmann@lock-net.com>
  • Date: Tue, 25 Aug 2009 06:09:59 -0400


That's the experiment I did. It's in the archives. As I recall, I
toilet tank soaked them for ten days before burrito'ing.

<The test that would work is using same
crosses (or species seed) do soaking and rinsing, and then have one
batch chilled for two months and one batch chilled for three months.>

But that was just for a minimal number of crosses - given the diversity
of the gene pool with bearded irises, my best guess (based on what I've
seen in my own crosses) is that it varies a lot.

Part of the reason I started burrito'ing longer than 2 months was
because of the comment several folks had made about seeing seeds
germinate in the fridge, something I had <not> seen. Earliest I've seen
seeds germinate in the fridge is 3 months.

I quit pre-soaking because it's less trouble to soak/rinse after
planting & I'm getting such good germination now (relative to what I was
getting with presoaking and just two months of chilling, 80% or more in
some) that it was clearly an un-necessary bit of fussing around. Plus I
do see seeds germinating in the fridge without it. Mold may break down
the germination inhibitors as well as or better? than soaking.

Keep in mind that the cultivars that are fertile here are those that can
tolerate highly erratic weather (i.e., late spring freezes, warm mid
winter spells followed by freezing, no snow cover), something I think
you've said you don't have, Chuck. Or less so than here.

I don't have access to the literature like you do, Chuck, but did do a
lot of experimenting, starting from to experiences others posted to come
up with something that works for me.

But you convinced me to try sphagnum moss, &, thanks to late freeze, few
enough pods that I went ahead and shelled them only a few weeks after
putting them in the fridge. If I get better germination than in the
past, I'll let you know ;-)

Research is a whole lot more fun when theory doesn't match data. ;-)

Theoretically, are there additional chemical germination inhibitors
other than those broken down by chilling and those that are water
soluble? I.e., those that just break down with time, wet or dry, cool
or warm? I dont' remember reading about anything like that.

>From what was posted earlier, pinks and plics need less chilling than
others. Whatever that means!

<The test that would work is using same
crosses (or species seed) do soaking and rinsing, and then have one
batch chilled for two months and one batch chilled for three months.>

Probably waay more than you <ever> wanted to hear, Patti! ;-)

Linda Mann

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