Your boreder should be looking like this one now.

Now you can take more greenery like this one and add it to your border

It should look like this

Now turn your fence around to the back like it is shown in the Picture. Take out your bag #3 that has the green poly fiber and take some out. Add glue on the cardboard showing like this in the picture

Add the poly fiber to this BE CAREFUL. This is very thin and you can burn your self. Do this on the entire back side. You can use sheet moss if you do not have poly fiber.