There is a new set at the Sims 3 store called One With Nature:
The blurb from the store reads:
Decorate your Sim's home with these inspired pieces that are tasteful enough to put in an upscale home, yet cozy enough to put in a backcountry cottage. With the included clothing, you have everything you need to become one with nature.
You can find the set here:
One With NatureIt is available for 1200 Simpoints.