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Brussel Sprout Plants Winter Survival?

 
Posts: 947
Location: Graham, Washington [Zone 7b, 47.041 Latitude] 41inches average annual rainfall, cool summer drought
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So I'm reading that Brussel Sprout plants are biennial, getting seed requires them to survive through winter.

But thus far nobody online seems to actually quantify what temperatures these plants can endure unprotected in order to survive and reproduce the following year.

Any advice would be greatly appreciated.

[Yes, I know I can hack a microclimate to protect the plants, but before I invest that effort I want to know exactly what I need to protect them from.]
 
Mother Tree
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Most of the cabbage family can tolerate a good bit of frost. In the UK, sprouts are grown as a winter crop and it's perfectly normal to pick them with frost on. In zone 7, I'd be inclined to just experiment and let them grow out. I bet most of them will do just fine!
 
pollinator
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Brussels sprouts can tolerate hard frost (32F) but may be damaged at temps below 25F according to this article: https://www.botanicalinterests.com/articles/view/26/Frost-Tolerance-of-Vegetables

This article says Brussels can stand temps as low as 20F: http://www.harvesttotable.com/2009/01/how_to_grow_brussels_sprouts/
 
Kyrt Ryder
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Location: Graham, Washington [Zone 7b, 47.041 Latitude] 41inches average annual rainfall, cool summer drought
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That is exactly the sort of information I was looking for.

Thanks Tyler.

So they're just vulnerable enough to die here unsheltered, but shelter should be sufficient to keep them alive.

I'll see what happens next winter.

EDIT: and of course NOW I casually bump into the information I wanted. Another site says they can survive down to 0F, which means I'm better off experimenting with different varieties and seeing what survives. [Of course nobody lists which varieties are more cold hardy >_<]
 
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