Dirt spikes are used in hard soil regions to stabilize pool fence in areas without concrete. The dirt spikes are 24" in length and get driven into pilot holes drilled with an auger bit. The poles then go into the top of the dirt spike as if it were a drilled hole.
*The dirt spike is intended to be used for one or two poles in a planter area. Many customers have used them successfully for their entire fence, but be aware your fence is only going to be as strong as your soil.
The best way to determine if dirt spikes will work for you is to insert a common household rod, like a broom handle, 2' into the ground. Then push and pull on it, that is how strong your fence will be.