Re:Re: HYB: pod ripening/germination

I have 'hatched" seeds many times in a fridge over summer. Normal fridge temperature. These are planted flats of seeds that didn't germinate over winter. Inevitably the seeds are germinating after three months at this temperature, as long as they didn't dry out. They start to germinate in fridge.
Great germination this past winter in cold room in garage. I had a small space heater on low to kkep them from freezing. the ones that dried out didn't germinate well and are now in barn fidge.
Worst germination ever was when I had seeds in cold greenhouse. The high temperatures resulted in very low levels of germination. 

Chuck Chapman


Date: Sun, 14 Jun 2009 17:08:40 -0400
From: Linda Mann <lmann@lock-net.com>
Subject: [iris] Re: HYB: pod ripening/germination

Too hot or too cold at the wrong time are bad, but I don't have
temperature data.
Too cold is maybe below 25oF? just as seeds are about to sprout; too hot - - don't know, but I worry above 70oF - if they do sprout, they are more 
likely to damp off or fizzle.
After having burrito bags occasionally freeze in the fridge, I've set it 
higher to make sure it always stays above freezing.  Seems to be better
germ that way. After planting, try to keep seeds below 60oF, preferably 
in the 40s at night, no higher than 70 during the day.

Maybe others will comment - I haven't checked the archives, but seems
like Vickie Craig posted something about germination temperatures for SDBs? 

There's some combination of warmth and drying conditions that stops?
slows down? germination in spring - used to think it was just warmth,
but this spring, all the rain, or maybe the genetic mix (Oz & CA genes)
kept things sprouting later/warmer than usual. Or maybe the maximum was 
lower.  Don't know.

Some seeds germinate at refrig temps - 40oF?  Mary Lou has seeds in the
fridge germinating after 2 yrs there (I think)!

<What temperatures have you found to be good or bad? David>

Not much good information - hope that helps.

Linda Mann
TN

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