Ladybugs are part of a gardener’s arsenal during the growing season, and can help you fight off aphids and other pests on at-risk plants such as tomatoes. If your garden isn’t a natural habitat for ladybugs, you can buy them via mail-order and they will arrive in a chilled dormant state; you can then release them into your garden. In the fall, your ladybugs will try to find a warm spot to overwinter, which can include your indoor living spaces. If you encounter a ladybug invasion, the easiest way to deal with them is to use a vacuum to scoop them up and place them back outdoors where they will overwinter in leaves and other garden debris.