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

An adult does well in a vertical enclosure about 8 inches (20 cm) tall, and spiderlings go in smaller ones sized to them. 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

69 to 83F 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 species need more, around 75 to 80%, and that much moisture needs vents at opposite ends of the enclosure, at different heights, so air moves through it. Mist one corner of the enclosure every few days with dechlorinated water, using a fine mist spray bottle, and aim to leave drinkable droplets rather than soaking everything, since dehydration is one of the most common reasons captive jumping spiders die. Track it with a digital hygrometer rather than guessing. Good ventilation matters here too, humidity without airflow invites mold.

Substrate

Coconut fiber, or coconut fiber mixed with moss, holds moisture and helps buffer humidity swings between mistings.

Lighting

This species is diurnal and genuinely relies on vision to hunt, so provide bright light on a 12-hour day and night cycle. A daylight lamp around 6,000K on a timer handles both.

Where the Enclosure Sits

Keep the enclosure out of direct sun and away from heaters and other unregulated heat sources, which can give a spider this small heatstroke. The room matters for chemicals too: candles, air fresheners, pesticides and flea treatments on other pets reach a spider this small through the air, the same risk laid out in the invertebrate pesticide hazards guide.

The Spider ICU

A spider ICU is the emergency version of this enclosure, kept ready for a spider that is shriveled, curled up, or not responding:

1. A small, clean plastic container with air holes and a tight lid, lined on all sides with paper towel soaked in warm water. The small volume holds humidity far higher than the display enclosure.
2. A damp cotton ball inside, so the spider has somewhere to drink.
3. The spider moved in and left alone to rehydrate.

A spider that stays curled and unresponsive in the ICU is the point to find a vet who sees invertebrates.

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