Cucumbers too close to celery?

I have some young cucumber plants next to my baby celery plants. Is it safe to transplant the cucumbers? Im worried they're too close to the celery.
Photo here: http://www.ziddu.com/download/8455881/CucumberCelery04-02-10.jpg.html

 

Where are you!

 

New Zealand

 

How many celery plants are in that small grouping? They might be a good companion plant, but as the cuke grows - do you have something there for it to climb so that celery won't be shaded by the big leaves? Have you given each plant the room that is suggested on the seed packs - it does look like it could get a little overcrowded.

To save transplanting the cuke at that size though - maybe put a trellis along the fence and train the cuke plant there to help out with it not draping over the rest of the vege?

So jealous by the way that you have vege growing so healthily and we are just eager to get out in the potting sheds here!