Cape gooseberries- new to me.

They seem very slow growers, they're only about 4in tall, so far.....how big do they get?

I have some 11in wide x 9in deep pots for them how many should I plant in each?

Just 1 per pot then 

Maybe I'll only grow the 2 best ones on - in case they do grow ginormous 

If this is seed from the seed circle then the potential is gi-bloomin-normous... I had one plant in a morrison's flower pot and it would have reached the roof of the GH if I'd let it. It spread to take over about 1/3 of my 6x4 and was positively dangerous to the poor old toms that were in there. I kept it well watered and fed it chicken poop granules but it wasn't mollycoddled. I should have weighed the fruit I got from it - loads of the stuff.

I managed to overwinter it and its out in the garden this year - not growing so much put has got some flowers on so I'm hoping for some fruit from it again.

I per pot. Maybe chance a plant or two outside as well if the weather gets warm...

Pip pip,
Balders

Oooh! Thank you.

Thank you indeed -- I have twelve plants in a very sheltered spot at the plot, which are about a foot tall. They may need staking if they grow like Baldy's one 

I suspect they'll be less rampant outdoors...
    but you never know 

Pip pip,
Balders

Hadn't thought of that -- you could well be right!

Cut it back to about a foot high and then left it in a cold greenhouse.
Just occasionally watered it.
It was a fairly mild winter here and/or I might just have been lucky with it. i seem to recall reading that they are perennial in their native environments, so maybe North Devon = South America in some respects 

Pip pip,
Balders