"compo" wrote in message
...
Runner beans do not grow very well in the far north of scotland so this
year I decided to try growing them in the polytunnel. The plants are
growing very well, in fact I'm not sure whether I should pinch out the
tops to stop them over-growing. My main problem is that the flowers are
not setting any beans. How do I ensure pollination?

Thanks in advance,

Compo in Caithness.

It would seem that by growing them in the tunnel you have separated them
from their pollinating insects. Can you open the tunnel up on fine days?
Alternatively, next year I would work out a removable covering to allow
pollination. Maybe a frame that can be fleeced over, something like that.

HTH

Steve