Use Concrete when doing vinyl fence installation. It will keep everything in place
Vinyl fence installation is not a terribly hard task to undertake. One little tip though that I can give you is to make sure that the posts are bound in place by concrete. Being one of the toughest materials that we know of, concrete makes a fantastic base for any fence post because it allows that fence to float should your ground swell and heave. It also make sure that your fence post does not tip over and has a great base to sit on. Overall, I would really recommend using concrete because it's the most stable material that you could use. It's really a no brainer.