Historic & Scenic Sites in and around Washington County, MO by Esther & Gene Carroll History of Washington County Jails & Courthouses by Esther Carroll These links are a part of Carrolls' Corner - lots of Washington County History!
In a humid environment, over 60% of newly hatched fleas can live without a host for 2 months. In a cool, dry environment, only 10% will live without an immediate host. Humidity is the key to flea survival.
It can take as little as a couple days or as long as a couple weeks for flea eggs to hatch. Upon reaching adulthood, fleas may live a few more weeks, or up to a year or longer â¦ depending on numerous external factors.