If you’re in the United States, you can call 811 a few days before you dig so utility companies can come mark where they have lines.
For example, if you’re putting in a 4 in × 4 in (10 cm × 10 cm) post, your hole should be 12 inches (30 cm) in diameter.
For example, if you want a 6 ft (1. 8 m) post, your hole should be 30 inches (76 cm) deep. You need a solid foundation for your posts, so don’t dig holes in muddy soil. [4] X Expert Source Lui ColmenaresHandyman Expert Interview. 18 August 2020.
Gravel can be purchased at any home and garden store.
Avoid adding extra water to your concrete mix since it will make it weaker. Wear rubber gloves before touching concrete so it doesn’t dry on your skin. Have someone help you lift the bag of concrete if you can’t do it by yourself.
If you can, have someone hold the post while you pour the concrete so your post doesn’t move around.
If you don’t have a two-sided level, use a straight level and switch between checking each side of the post.