Hm, I was planning just put mine outside in the winter. -20 Celsius or something like that should be enough. I have planted only 2 varietes for dry beans this year.. A runner cross [I guess Scarlet Runner x Painted Lady], and a yellow bush bean. I don't have much place yet, so I was afraid of cross pollinations in bush beans.. I know that they are usually self pollinating, but I have a lot of pollinators here, of all kind, and bumblebees and butterfies loved the flowers of runner beans..
How do you avoid cross pollinations?
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