View the Beans - climbing page

27 Feb 17 Mike Empson (New Zealand - sub-tropical climate)

For two years, we have grown scarlet runners on a 2Mtr high frame with pipe outers and wire netting. The plants grow very prolifically, and the harvest was good, but lately the bean pods are significantly reduced in number. They get well-watered, and we pick regularly (perhaps not as frequently as we should) but the beans are tough to eat and quite large. The plant is flourishing well, so is it advisable to trim the tops of the runners, or should we let them grow unrestricted? If we trim them, will the plant still develop? We live in Howick.

Reply

02 Mar 17 John (Australia - temperate climate)

Short pods on healthy plants could be caused by poor pollination due to heat. Beans are a warm season crop but pollination and bean set on climbers like Scarlet Runner can be reduced on very hot days. I have seen Scarlet Runner with some good pods then a gap on the flower spike where the beans didn't set pods then more pods. Beans are self pollinating and don't set on very hot days. I presume the plants are growing from a root that has been in the ground for a number of seasons. As you suggest, regularly picking is a must to stop beans going tough. Cutting back the tops of the runners will reduce your harvest in the short term but will encourage denser growth and may make the plants more manageable. I trust this helps. Maybe another reader has some ideas to solve your problem.

Reply