Ask a Question forum: Do most seeds need to go through a freeze?

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Name: Jeanne
Lansing, Iowa (Zone 5a)
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gardenglassgems
Jan 13, 2015 4:19 PM CST
I collect my seeds in the fall as I suppose most of you do. Do I need to put the seeds I end up with in the refrigerator or the freezer to let them think that they went through winter? Seeds such as Coneflower, Allium, Blanket Flower, Columbine, Delphenium, Coreopsis, Daylily, Iris, Zinnia, and so on?
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Name: Greene
Savannah, GA (Sunset 28) (Zone 8b)
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greene
Jan 13, 2015 5:57 PM CST
It's hard to ask a general question as each seed/plant has different needs. I did find a good site with tons of information for specific plants giving temperatures and germination information. Hope it can help.
http://tomclothier.hort.net/page02.html
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Name: Jeanne
Lansing, Iowa (Zone 5a)
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gardenglassgems
Jan 13, 2015 6:04 PM CST
Thank You! I will look at the link and go from there.
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Name: Sandy B.
Ford River, Michigan UP (Zone 4b)
(Zone 4b-maybe 5a)
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Weedwhacker
Jan 13, 2015 8:56 PM CST
Jeanne, I can't say about most of those, but alliums, delphinium and zinnia have germinated well for me without any cold treatment.

Thanks for the link, Greene -- I have seeds for quite a few things I've never grown before so that will be helpful ! Thumbs up
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Name: Jeanne
Lansing, Iowa (Zone 5a)
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gardenglassgems
Jan 13, 2015 9:43 PM CST
I am going to try winter sowing for the first time this year. A friend of mine did it last year with success. I have so many seeds that I have harvested that I want to try. I have collected seeds from almost every flower in my garden for several years. I am going to give an assortment to a couple of my friends and help them winter, self sow in their yards. I can't wait to see what flowers belong to the seeds that are mysterious to me......

I just want to say that I LOVE ATP..............
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Name: Rick R.
near Minneapolis, MN zone 4a
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Leftwood
Jan 14, 2015 10:44 PM CST
There are no steadfast rules. But there are some generalities. Seed of most vegetables, garden annuals and tropicals do not need a cold treatment. Perennials and wild annuals can go either way. Most non-tropical woody plants do require a cold treatment. Most cacti seed do not need cold.



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