irises in october in north dakota.

hi,
just picked up about 50 iris plants at a rummage sale.
october in north dakota.
store these in a cool dry place til spring?
plant them?
any tips would be much appreciated.
thank you, larry
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Either/or. Both will work, but you will see results faster if you plant them now. Also, you might lose some of the ones in storage.
Dwayne

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