RE: HYB: Seed germination

Thanks Colleen.

Like you, I refrigerate for 3 months.  But I've only seen seeds from one
cross start to germinate in those 3 months.  It was an SDB X TB last
year.

Most of the crosses from cultivars that thrive (more or less) here seem
to take at least two chilling cycles to germinate.  Outcrossing to
Keppel/Ghio/Blyth lines seems to produce seeds that are more likely to
germinate after only one 3 month chill cycle.

Since a lot more seeds germinated after a second chilling cycle (out on
the unheated sun porch), I'm not sure how much difference leaving out
the pre-soak made.

Then there are those crosses that haven't germinated anything yet, in
spite of 3 months in the fridge, a month of warmth, and two more weeks
of chill.  They are going back outdoors to get frozen instead of just
chilled.  See if that makes any difference.

--
Linda Mann east Tennessee USA zone 7/8
East Tennessee Iris Society <http://www.korrnet.org/etis>
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