"John Bachman" wrote in message
...

Milky Spore lasts 15 - 20 years. I inoculated my 2 acres 10 years ago
and have not had a mole problem since then.

That sort of depends upon your climate. If the temperatures are too cold,
milky spore doesn't work that well. Ironically, you actually need some grubs
to continue your innoculation because new milky spore is only produced by
grubs ingesting it and then dying.

-al sung
Rapid Realm Technology, Inc.
Hopkinton, MA (Zone 6a)