We bought a house that had sat empty for about 18 months. The previous owners had a dog. We moved in and the place was full of fleas so, at least 18 months!
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02/25/2010
The eggs are still hatching. Vacumn every day and they will soon be gone.
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02/21/2010
I was told it could be as long as year, but don't take that to the bank. I do know it's a long time.
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Flea Life Cycle
How often do fleas mate?
Liza
RE: Flea Life Cycle
I don't know if it helps, but an exterminator and a vet told me that their eggs hatch every two weeks. So we had to treat our house every two weeks. So gross. Good luck, hope this helps. (11/10/2008)
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Eco-Friendly Flea Remedies