Pill millipedes need a deep, organic substrate, steady moisture, leaf litter, decaying wood and plenty of shelter to do well in captivity. They are close-ground animals that live and feed in the substrate, so a shallow decorative setup is not enough.
If you are thinking about Pill Millipedes, it is worth remembering that different groups and species can vary in size, appearance, activity and husbandry needs. For identification and comparison before you choose, our Millipede Species Guide is a useful starting point.
This guide focuses on the practical care points that matter most: how to build the enclosure, how to keep moisture stable and what to check as the setup settles.
How to set up pill millipede habitat
The enclosure should be built around the substrate. For pill millipedes, the substrate is not just bedding: it is habitat, shelter, feeding ground and the place they burrow, rest and moult. They need depth and structure rather than a thin decorative layer.
Start with a deep layer of organic substrate, then add leaf litter on top and include decaying wood where appropriate. This creates a more stable base and gives the millipedes somewhere to hide, feed and move through the lower layers. The aim is a functional habitat that holds moisture without becoming muddy or waterlogged.
Leaf litter helps protect the surface, supports feeding and gives extra cover. Cork bark, rotting wood and moss can also be useful because they add shelter and help keep the enclosure calm and stable. These furnishings should support the habitat, not just fill space.
Moisture is best managed through the lower layers of the substrate rather than by making the whole enclosure wet. Pill millipedes generally do best when the setup stays evenly damp and they can choose slightly different microclimates within it. If the substrate dries out too far, they may become less active. If it stays too wet and stagnant, the habitat can break down poorly. The goal is steady, workable moisture.
Feeding should reflect what millipedes use naturally. Most of their diet comes from decomposing organic material in the enclosure, especially leaf litter and rotting wood. Fresh food can be offered as a supplement, but it should support the organic base rather than replace it.
Because pill millipedes are compact and strongly armoured, new keepers sometimes expect them to be less demanding than longer-bodied species. They still rely on depth, cover and stable conditions. Many individuals will stay buried or hidden for long periods, especially after a move, and that is normal behaviour rather than a sign of failure.
How to keep things steady
Once the enclosure is established, consistency matters more than frequent changes. Avoid disturbing the deeper layers unless you need to, because repeated digging or resetting can interrupt burrowing, feeding and moulting.
Watch the substrate and the animals' behaviour. Healthy substrate should gradually soften and break down as leaves and other organic material are used. If the lower layers are drying out, compacting badly or developing a sour smell, adjust the moisture balance. If the enclosure always looks tidy but the substrate stays thin and inactive, it may not be providing enough function for long-term care.
Different pill millipede species can have different expectations, so proper identification matters before you assume heat, moisture or depth requirements. If you are comparing species, the Millipede Species Guide and our individual care pages are the best place to begin.
For example, the Lanna Giant Pill Millipede (Zephronia lannaensis) and Siam Giant Pill Millipede (Zephronia siamensis) are both pill millipedes, but the exact species still matters when you are setting up the enclosure.
If you are new to millipede keeping, our Complete Millipede Care Guide covers the wider basics that sit behind pill millipede care.
The main takeaway is simple: give pill millipedes a deep organic base, stable moisture, leaf litter and shelter, then leave the habitat to settle. A calm, well-structured enclosure will do far more for them than a surface-focused display.