When beans aren't flowering, it is usually just because it's too early. Are you shoots at the top of the poles? When they get there, it should flower.
Also, make sure that the flower buds didn't just drop. This can happen in hot and dry weather. Make sure you add compost around the roots to keep them moist. Also, sometimes, they drop if it's windy and there aren't enough pollinators coming around. Do you have bees?
When beans aren't flowering, it is usually just because it's too early. Are you shoots at the top of the poles? When they get there, it should flower.
Also, make sure that the flower buds didn't just drop. This can happen in hot and dry weather. Make sure you add compost around the roots to keep them moist. Also, sometimes, they drop if it's windy and there aren't enough pollinators coming around. Do you have bees?