Cucumber going yellow

No one else had this with a cucumber then?

Maybe, looking at some of the other cuke threads, I'm lucky to have got my little cuke plant to grow big enough for it to try and produce a fruit  It seems to be a bad year for cukes all round 

Can I feed it with some tomato food to help it along?

I've had 2 lovely cues off the one in the greenhouse, but that's all

All the other babies cues are turning yellow the same as yours.........it is getting watered and fed the same as the toms, and looks healthy enough.
It can't be overwatered, cos it's in a bottomless pot in the border so drains freely.

All this basically means.......... I don't know either, sorry 

My little cucumber in the greenhouse is nearly 2 foot tall now and has started producing little cucumbers.

They are curling up and turning yellow though 

From reading the above, is it the fruitlets curling up and turning yellow, or the plant itself?  If it is the fruit, then it sounds like it might be the flowers were perhaps not successfully pollinated?

could be a combination of things maybe compost/soil too dry  and maybe not enough food ,give them a good drink of comfrey juice,manure ,nettle juice diluted of course