Inoculate seed with AMF seaweed worm or compost tea, doesn't have to be brewed and EM. Soak for 5mins. Dry out.
Wait for a rainy forecast, broadcast, mow or slash over them.
If a nice rain follows you are away.
Follow up with compost tea or worm tea
To cure flea problems- repair the soil with an active biological compost and apply to the affected areas or compost extract soaked into your soil. Beneficial nematodes will take care of flea larvae. From memory I am pretty sure I heard Elaine Ingham say that
