[al78]

Picked some climbing bean seeds at a seed swap at the beginning of the year which initially produced purple pods like on the right of the image but since late summer began producing green pods as on the left of the image. Can anyone tell me what variety of bean this is and why it produces different coloured beans during the season.

[kirpi]

The one on the right looks like a pod from District Nurse, French climbing bean, but they would then dry up and produced cream beans speckled with purple; no solid green pods.

They look like pods from different plants - did you maybe get a mixture of seeds from your seed swap?

[Annen]

My broad beans produced a mix of beans this year because I used seed that got cross pollinated last year ( I think) So I got some red epicure looking beans and some beds champion/wikiem manita looking beans. Maybe thats how it happened.

[al78]

The one on the right looks like a pod from District Nurse, French climbing bean, but they would then dry up and produced cream beans speckled with purple; no solid green pods.

They look like pods from different plants - did you maybe get a mixture of seeds from your seed swap?

It definitely isn't due to different seed. The seeds when I got them were cream with purple speckling, which is what the seeds in the purple pod look like when opened. The seeds in the green pod are cream. In addition both pods are from the same plant.

[beesrus]

Could be the unknown seeds you got at the seed swap were the evil spawn from a F1 variety, in which case anything could happen.
The picture looks like half French, and almost a bit of runner thrown in. Several  F1s around these days that cross between the two, moonlight being one that produces a creamish seed. The speckle would suggest a likely Runner antecedent involved somewhere in the distant past.

[LotuSeed]

My black turtle beans look similar to that. Some of the pods are a deep purple while others are green and this can be seen on each plant. The beans from inside the different colored pods are all the same color though: black. Could it maybe just be a case of the purple being more ripe/fully mature and the green ones being not quite so?  That's what in guessing with mine anyway.