Dwarf french beans no longer making beans

[drf]

First-time grower here, who's having reasonable success so far. I have dwarf french beans (6 plants, 2 to a pot). Planted in June, they've grown really nicely and have been cropping pleasantly heavily for a few weeks (beans in the freezer!). Now however they appear to have slowed down/stopped (very few new beans and some that are on the way are looking very thin). It's rather a shame - I was expecting more weeks of production. The plants themselves still look healthy (nice green leaves), but there are no new flowers. What could be the cause? I'm wondering if it's:

1 - just how it is (I should've done a successional planting)
2 - compost exhaustion (they're in pots, growbag compost, but I've been feeding them quite regularly since they started cropping - liquid seaweed/growmore)
3 - too much feeding, or the wrong sort (since they're in pots I was worried about running out of goodness, and can't get too much liquid in there in one go so I've been feeding on Wed/Thu and Sat/Sun during regular watering)

Any tips? Or are they just having a rest?

TIA

Chris

[Two_Sheds]

I think they're just exhausted now. No more beans. yes, you def. should do successional planting, for a longer season, and/or plant diff.varieties

[valmarg]

drf, you could try changing from a general fertiliser to a high potash (tomato) feed, in order to try to encourage more flowers.

valmarg

[Snadger]

I agree with Valmarg......... no need to give legumes nitrogen as they fixate there own. If you have been (eek!) giving them extra nitro they may be producing leaves at the expense of flowers.
Use a high potash tomato fertiliser and you may get a few more flowers!