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A daft question but.....
Can I grow different varieties of beans- ie Runner, Borlotto, and climbing french beans up the same wigwam? ......thinking cross pollination here.
Cross pollination only matters if you intend to save your own seed to grow next year. I often grow purple french beans with my runners and they do look pretty.
Frenchies sometimes cross with each other, but not often (they are self-pollinating, and are pollinated before the flower opens); runners are more promiscuous (they are insect pollinated, by 'buzz' pollination) and will cross with other runners, but not with French beans
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