Bigger bog garden

[Parrot lady]

I have a 4 by 6 Bob garden how can I make it wider without removing the liner out of the bog garden I have now

 

[Jhn]

Can seam the liners together, short of that not really much else. Short of adding another bog That is just fed separately.

 

[poconojoe]

I think it would be easier to just add another bog.

 

[GBBUDD]

A second bog in a completely different area or you can build one higher then your existing bog and have it empty into the top of your existing bog.
Like @Jhn said you can seam but seeing as the bog is 4 sided there are probably lots of wrinkles and those make it difficult to seam