Hi Barrie
Personally I would have plain not patterned cushions as I wouldn't want to distract any attention from the zebra rug. But perhaps that's because I have always wanted a zebra rug and if I had one I would be showing it off

. My DH doesn't like them

. But I would be sure that the fabric of the cushions is a good quality or has some texture or shine to the fabric. I wouldn't get plain green cotton cushions.
I would also get a green throw rug, once again with an interesting texture to it. It will be good for those cold nights you must be having at this time of the year.
I'm not sure if you have wall space for some good size pictures? But some pictures of plants or forest or vineyards, anything like that with green as the main colour would add to your look.
Then there are your green ornaments you bought. It should be looking good.
I can't wait to see the finished result