I live near a river and have groundhogs living under my shed. I've tried everything to get rid of them but even when I do, a new one moves in. So what perennials or herbs do groundhogs NOT like to eat?

I do not think finding out what they eat is the answer. Live trap can work. Put a head of lettuce in it. But now there are so many other green things out there, it may not be tempting enough. I had the same problem and they can do a lot of damage to the foundations of buildings. Caught 2 in a live trap. Shot 2 others with my .22. They do make smoke bombs you can drop down their holes. You could also find something that smells bad to drop down their holes but they will just start digging a new tunnel under a different part of your foundation I'll bet. Gene

For a quick minute I got all excited because I thought you had discovered a way to plant a "Groundhog-resistant garden"...

You could try to repel them by placing human hair in the area - ask at a barber shop. Some people have tried placing old shoes, stinky T-shirts, socks and other items with the human scent...um, er - that would include human urine (but the urine could also attract rats since you live near the water so maybe not).

There are repellents you can purchase but they need to be re-applied and can get very expensive.

I am in the exact same situation as you. Here are somethings that have not been bothered by GH:
astilbe, asiatic lily, day lilies, stargazer lilies, lavender, thyme, clematis, roses, irises, torch lilies, japanese blood grass, japanese forest grass, thyme, columbine, hibiscus, bee balm, saint johns wort, peonies

To help the hogs move away, get them out of their hole and then fill in the burrow with sharp edged gravel or stones. Limestone rock used on rock roads works pretty well. Ground hogs do not like to dig rocks and will find a new home, hopefully away from your garden. Trapping or just plain shooting is about the only way to discourage them. No matter what you grow they tend to root around looking for a snack.

Actually Penn State has a list of Groundhog resistant plants, mostly flowers, but also a few herbs and veggies. A huge list of flowers for every garden. I'm thinking of desperately trying the bigger ground hog resistant plants all around where their holes already are.... heck - they've started eating the wooden siding on my garage! Type in "Groundhog resistant plants" - and the penn state article should come up - it's great!!!! There just isn't enough gravel or traps to fill these holes .... and I live in the village - so shooting them is out of the question - though I'd like to .... and I'm even a veterinary technician!!!!

Funny, my one hog only eats the birdseed and cracked corn along with all the other critters. It's the BUNNIES that touch my plants.

Gayle