Yes, many millipedes can live together, but the safest option is usually a same-species group in a setup that suits the species. Mixed-species enclosures are much less predictable and should only be considered after checking the needs of every species involved.

Shared housing works best when the enclosure gives each animal enough space, deep substrate, steady moisture, food and shelter. If those basics are wrong, a group can become stressed, inactive or difficult to manage.

For enclosure planning, see What Size Enclosure Does a Millipede Need? and How to Set Up a Millipede Enclosure.

What makes a shared millipede setup work?

The main thing to understand is that millipedes spend much of their time in the substrate or under cover, so the enclosure itself matters as much as the animals. A good shared setup usually needs deep, suitable substrate they can burrow into, consistent moisture without waterlogging, leaf litter and other natural food sources, rotting wood or similar enrichment where appropriate, multiple hiding places and enough floor space for the group to spread out.

Compatibility depends on species, adult size and how much of the enclosure the animals are likely to use. Some species tolerate close quarters better than others, while larger or more active species may need much more room than beginners expect. For that reason, same-species groups are usually the safest starting point.

If you are thinking about a mixed setup, check the requirements of each species carefully first. In most cases, shared housing is only worth considering when the husbandry needs overlap closely and the enclosure can meet the needs of all the animals involved.

Everyday care

Keep the routine simple and consistent. Millipedes generally do best with stable humidity, so the substrate should stay moist enough for burrowing but not soggy. Provide plenty of leaf litter and other decaying organic matter, and make sure food is available in more than one area if the group is active or numerous. Multiple hides are important too, because they let the animals separate naturally instead of crowding into one refuge.

Observation is usually more useful than handling. A healthy shared enclosure often looks quiet, with millipedes spending much of the day out of sight. Regular feeding, juveniles appearing, and steady use of the substrate and hides are all good signs. If you are unsure how many millipedes can be kept together, our guide on How Many Millipedes Can Live Together? covers stocking pressure in more detail.

Common mistakes

Crowding is one of the biggest problems in shared millipede housing. A setup can look fine at first, then become too tight once the animals grow or become more active. Shallow substrate is another common error, because millipedes need depth to burrow and separate naturally.

Overhandling can also disturb a settled group, especially if hides are lifted often or the enclosure is constantly rearranged. Overcleaning is just as risky. Leaf litter and decaying wood are part of the habitat, not waste to remove completely, so it is usually better to top up materials gradually and only remove genuinely spoiled areas.

In short, millipedes can live together, but success depends on matching the species, giving them enough space and keeping the enclosure stable.