Allotments 4 All

I sowed 3 pots of cucmber, two seeds to a pot and culled the weakest back in april.  I chucked the first "weakling" but thought about the other two - Why not stick them in a pot of compost? They are still alive and well. One has even managed to throw out a third leaf since it's decapatation.

Is it worth me persevering with these? I can see some little flower buds, but will the fruit be ok if they do manage to survive that far?