We get them in MD for anywhere 6-8 weeks every 17 years! My first time with them I had really long hair and one got caught up in my hair when I was trying to pump gas.
I freaked out and was wailing around trying to get it out! I know the attendants were laughing at me inside! This 2nd time (about 3 years ago) it wasn't so bad where I live. They aren't prone to sandy soils-Thank Goodness!
Also, don't let your dog eat them, it is not good for animals, dogs and cats.