Jumping Spider Enclosure Setup: Small, Simple, and All About Humidity

Jumping spider setups are small, inexpensive, and simple once you understand the one factor that matters most: keeping humidity consistent.

Enclosure Size

A minimum of about 4 by 4 by 7 inches, vertically oriented, works for an adult, and something closer to 8 to 10 inches tall gives more genuine climbing room. This is an arboreal species, up and down space matters more than floor area. Use a front-opening design with cross-ventilation, and house one spider per enclosure, they're cannibalistic toward each other.

A tall, vertical enclosure like the Exo Terra Nano fits these proportions well. Furnish it with a few pieces of small cork bark or artificial plants, reptile-scale cork bark is oversized for an enclosure this small, so a piece actually sized for the space matters. These also give your spider anchor points to build its silk retreat against.

Temperature

72 to 82F suits this species well, and normal room temperature is usually fine without any supplemental heat at all. If your space runs consistently below about 70F, a thermostat-controlled heat mat on the side wall works, but never place heat under the substrate, and never run one without a thermostat.

Humidity: The Factor That Matters Most

Target 50 to 60% for Phidippus species like the regal jumping spider, tropical genera need more. Mist one corner of the enclosure every 2 to 3 days with dechlorinated water, using a fine mist spray bottle, and aim to leave drinkable droplets rather than soaking everything. Track it with a digital hygrometer rather than guessing. Good ventilation matters here too, humidity without airflow invites mold.

Substrate

Coconut fiber, or a coconut fiber and sphagnum moss blend, about an inch or two deep, helps buffer humidity swings between mistings. Avoid sand or vermiculite, and skip using bare paper towel as a long-term substrate, it doesn't hold moisture well enough.

Lighting

This species is diurnal and genuinely relies on vision to hunt, so provide bright ambient light on a normal 12-hour day and night cycle. UVB is not required for this species.

The Non-Obvious Requirement: Leave Room Near the Top

Jumping spiders build their silk retreat near the top of the enclosure, so it's worth positioning your access opening lower or to the side. One more useful habit: check your spider's abdomen regularly, its condition, plump versus shrunken, is the best quick daily indicator of overall health.

This setup runs noticeably smaller and simpler than most invertebrate enclosures. Height is what matters here, while a tarantula or an emperor scorpion is a ground animal that needs floor space and substrate depth instead.

Sources & Further Reading