RE:HYB: Freezing Iris Seed


	Some Notes on 'freezing seeds' from various readings and experience.

	Stratification is successful when temperatures are below 40 degrees
F, so freezing is not necessary.

	Seeds need to be protected from the drying effects of the
refrigerator/freezer so should be bagged in plastic with a small amount of
barely moist sterile mix - like sphagnum moss. 

	A regular frost free freezer is not recommended due to the alternate
freeze/defrost cycles apparently, a chest type (old style) freezer is OK
however.

	The best results for me have been outdoors in the shade (until early
Spring), exposed to our frequent winter rains and nighttime temps in the
high 30's/ low 40's (Zone 9). Where rain is scant pouring near freezing
water over the seed pots is supposed to be beneficial, the seed coats
contain germination inhibitors which slowly wash away over time.

Chad Schroter
Los Gatos CA Zone 9

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