The search for natural flea remedies continues: nematodes

As spring is potentially arriving (we are getting about an inch of snow or slush today!), I have been doing more research into natural flea remedies. There seems to be several new products out there.

One is Nematodes..which are actually naturally occurring predators that live under the soil’s surface. They are not harmful to people or animals, or birds, plants and the rest of the environment, and I have read that they kill fleas in the yard or garden.

Nematodes start killing fleas within a day of their application, but it takes about 2 weeks for them to reach their full effect. An application lasts about 90 days and there are specific ways that they should be applied.

Has anyone had any direct experience with Nematodes? I like that each application lasts for 3 months and it seems like a safe way to keep fleas out of my enclosed cat pen in the summer and early fall.