Contrary to popular belief, garden spiders and other outdoor spiders do not move indoors for the winter. The spider species homeowners find indoors are usually spiders adapted for indoor environments. With low humidity, inconsistent food sources and difficult to obtain water sources, North American spiders that needed artificial shelter for the winter would have most likely gone extinct before Europeans arrived with house spiders in tow.
Because spiders are cold-blooded, they aren’t attracted by the warmth of your home. Occasionally, misdirected male garden spiders may come indoors in search of mates. Typically, outdoor spiders that end up indoors do not reproduce and generally die, as they cannot survive in such dry conditions.
Outdoors, in your garden, garden spider infestations are unlikely, as the available food sources in one garden probably couldn’t support multiple garden spiders. Garden spiders don’t damage the plants in your garden but conversely, it turns out, they help to control garden pests. Voracious eaters, garden spiders are not picky about what insects they consume. Although organic farmers use garden spiders to control vegetable and fruit pests, garden spiders will eat anything that gets trapped in their webs. Unfortunately, this includes bees and butterflies, busy pollinating your garden that may wind up in a garden spider’s web.