I grew Runners many times in a hotter/colder climate here in So Cal where it would regularly go over 100 in the summer and drop into the 20's in winter. I don't remember any tubers on my runners there, and they certainly didn't come back each year. When I grew them here, in a much more moderate climate I got tubers. I didn't look it up until after I had ripped the plants out at the end of the season. The roots didn't look like any bean I had seen before - I thought they were diseased LOL
Now that I know they can come back year after year here I am planting them in more permanent locations.
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Elizabeth
If I'm going to water and care for a plant it had better give me food, flowers or shade.
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