Growing courgettes sideways?

Hi all, I am wondering if it is possible to grow courgettes sideways (for example out of large holes in a wall etc..) the reason I ask is that I have a small garden but love courgettes and want to grow as many as possible in my small space.
Thanks

 

Hi Nick,

I don't see why not as long as they've got enough root space & you can get water to them.

A trailing variety might be worth a go.

 

Thanks guys your advice and support really helped, I just need to think about the issues John pointed out about the soil coming out