Millipedes prefer dark and damp environments to hide in. Common places outside include leaf litter and mulch outside, under rocks, and in compost piles.
Inside your home, millipedes might often choose to hide in basement corners, crawl spaces, behind baseboards, and under potted plants.
Millipedes may also be in piles of firewood, under carpets, in closets and storage areas, in cracks in foundations, under appliances, in garages, and in window wells where moisture can accumulate.
If you suspect millipede problems, look in these places for live bugs, dead bug bodies, and light damage to soft plant tissues.