🌱✗ Tested and false“Missing a few pods when picking won't affect the rest of the crop”
Regular picking, every 2-3 days once cropping starts, is essential: a pod left to mature signals the plant to stop producing more.
Our read On most crops a missed pick just means one slightly overgrown vegetable. On this one it changes how much the whole plant goes on to produce.
What to do: Pick every 2-3 days once pods start forming, and treat a forgotten, overgrown pod as a genuine cost to the rest of the harvest, not a minor miss.
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- RHSHarvest every 2-3 days; essential to prevent pods maturing, which stops further cropping
“The heaviest-cropping AGM variety is always the best choice, whatever your climate”
Several AGM runner beans, including 'Firelight', are specifically bred for improved pod-set in hot, dry summers, a condition Scotland rarely supplies. Varieties named for cropping well in poor conditions or 'whatever the weather' are a better fit here regardless of headline yield figures elsewhere.
Our read An AGM award tells you a variety performs well somewhere, not that it performs well here. Reading past the headline trait to what conditions it was actually bred for matters on this crop specifically.
What to do: Choose a variety named for reliable cropping in cool or changeable weather, such as Moonlight or Stardust, over one bred primarily for heat tolerance.
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- RHS'Firelight' is virtually self-fertile with improved pod-set even in hot dry summers; 'Moonlight' crops well in less than ideal conditions; 'Stardust' gives a heavy crop whatever the weather
“Pull up the whole runner bean plant, roots and all, once harvesting is finished”
Cutting plants to the base and composting the top growth, while leaving the nitrogen-fixing roots in the ground, boosts soil nitrogen, the same advice given for broad beans.
Our read It's the same habit that costs broad bean growers their soil benefit, just on a different legume.
What to do: Cut plants at the base once cropping is finished and leave the roots in the ground.
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- RHSCut plants to the base and compost; leave roots in the ground to boost soil nitrogen
“Dwarf runner bean varieties still need the same tall cane structure as climbing types”
Dwarf varieties, up to 45cm tall, only need short twiggy sticks for support, nothing close to the 2.5m canes a climbing wigwam or A-frame needs.
Our read The word 'runner' does most of the work in people's assumptions about this crop, but the dwarf types are specifically bred to skip the climbing habit and the structure it needs.
What to do: Choose a dwarf variety and use short twiggy sticks, or skip support altogether in a container, rather than building a cane structure a dwarf plant will never use.
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- RHSDwarf varieties reach up to 45cm tall; insert short twiggy sticks between plants
“Planting nasturtiums next to runner beans will definitely keep blackfly off”
Garden Organic presents nasturtiums as a trap crop that draws blackfly away from beans, but as practice rather than trial data, and its own broader position is that companion planting claims 'often have unproven benefits'.
Our read Even taken at face value, a trap crop that works is still concentrating blackfly somewhere in your garden, just not on the beans, which is a genuinely different claim from 'keeping blackfly off' altogether.
What to do: Try it if you like the idea, but don't rely on it in place of pinching out growing tips once flowers set pods, which is the properly established defence.
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