A native of Southeast Asia, elephant ear is hardy in U.S. Department of Agriculture (USDA) plant hardiness zones 8 through 11. In USDA zones 8 through 9, elephant ear usually dies to the ground, returning in spring once soil temperatures warm. In USDA zones 10 through 11, the plant is nearly an evergreen, according to the Floridata website. Partial shade is ideal for the plant, though with enough water it withstands full sunlight.
In your case my guess is your fence posts were taller than the fence, so your wood fence posts should be in the ground at least 3 feet. When it is time to install the fence post, be sure it is in line with the other posts and it is plumb.It is also important that the fence post is centered in the hole.Start to add the crushed gravel in 5-inch lifts.our fence posts have a tremendous amount of force against them each time the wind blows. You may not think a 5-foot-tall fence is high, but in terms of wind load, it is substantial. To get an idea of what I am talking about, lift a 4x8 sheet of plywood up and take it outdoors on a windy day.
Allow the posts to dry overnight before installing the fence. Dig a hole two to three times the diameter of the fence post and 24 to 48 inches deep. The posts stand upright best when you bury one-third of the total post length, but you might not be able to dig as deep, so a minimum of 24 inches is acceptable.. Set the post in the hole while holding a level on the side to check for plumb. Fill in the hole around the fence post with more 1/4-minus gravel packed tight against the sides of the post.