Re: Freezing Seeds
- To: Multiple recipients of list <i*@rt66.com>
- Subject: Re: Freezing Seeds
- From: d*@victor.u-net.com (DX Victor)
- Date: Sat, 11 Jan 1997 07:23:52 -0700 (MST)
>In a message dated 97-01-09 10:03:37 EST, you write:
>
><< That's interesting, and makes sense. Is something you read, or something
> you've noticed in your own experience? Judy Sylvester >>
>
I have been reading the messages regarding seed germination and, in
particular, the use of freezing. I don't know how widely read Norm Deno is
amongst you. Since initially reading his report a couple of years ago, I
have gone over to his approach, using his experimental work where available
and his spread of methods where such results are not available. Overall,
this has made a significant improvement to my germination rates, across a
wide range of genera. Incidentally, one of his prime conclusions is that
'It has been found that temperatures in the range 35-40 were most effective
and temperatures below freezing were ineffective.'
I am still working off his 1993 report version, which covers the germination
of around 50 species of Iris. I hope to have the new version in the next
month or so.
Perhaps it is worth adding that one of his main results is that just about
each and every species has its own optimum germination method and that it is
dangerous to draw general conclusions for other species from the results for
a particular species. For example, I. tectorum germinates best in light at
70, I. ruthenica was better in the dark at 70 and I. innominata is best at
40. Some perform best after dry storage of the seed, others not.
Best regards
David Victor
'Seed Germination Theory and Practice'
Prof Norman C Deno, Pennsylvania State University
Published June 1 1993
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