How long do house spiders live for, and how big can they grow?
Most house spiders live for under a year, while some outdoor varieties of spiders can live up to 20 years. They reach their maximum size very quickly. Most spiders, the vast majority, die early on in their life cycle. This is why there are so many eggs and so many spiders being born all at the same time. Evolution or God wants to ensure at least some of the spiders survive. Once it has reached 5 inches that increases its chance for survival more than a much smaller and niave one.
