You need to strike natural fear into the heart of these porcupines in order to get rid of them. Using chemical repellents is usually considered to be inhumane. For example, you could install a sensor and a speaker that sounds a loud noise whenever the porcupines approach.
1 Additional Answer
Ask.com Answer for:
how do you get rid of porcupines
Asking politely hardly ever works with a porcupine; they tend to be prickly about such things. These North American natives are in fact peaceful creatures and strict vegetarians, chowing down green shoots, fruits and even tree bark. Their appetite for...