Yeah mine is much smaller holes than it needs to be. 4 x 4 in will be fine. Metal fencing is so much easier though lol and you can use it over and over. How big is the total scrog going to be? It's like $30 for 150 feet Lol. You need 12 ft. per plant at most. Hope that helps. You can use string but it can be really annoying and string/twine can loosen up really easily.