Your jumping spider enclosure setup does not need to be complicated. A front-opening acrylic or glass terrarium, 1-2 cm of coco coir, a patch of sphagnum moss, a piece of cork bark, a few diagonal twigs, and a small spray bottle. That is it. You can build the whole thing in 20 minutes and have a finished enclosure ready to inhabit tonight.
This guide walks you through every decision: which enclosure to buy, how to layer the substrate, what to put inside, how to manage humidity, and where to place it in your home. The step-by-step build is in the middle; the reasoning behind each choice is in the sections around it.
For context on everything beyond the enclosure itself, start with the complete jumping spider care guide.
Key Takeaways
- Use a front- or side-opening enclosure taller than it is wide. Jumping spiders are arboreal and need vertical space over floor space.
- Layer 1-2 cm of coco coir across the floor with a sphagnum moss patch in one corner. Keep the coir barely damp, never wet.
- Fill the upper two-thirds with cork bark, diagonal twigs, and small artificial plants. That is where your spider will spend most of its time.
- Mist one wall lightly every 48 hours. Target ambient humidity of 40-60%. A light misting should dry within a few hours.
- Cross-ventilation (mesh top plus side vents) prevents mould. Increase airflow before reducing misting if mould appears.
- No water dish, no cohabitants, no live prey left overnight, no treated or painted wood.
- Introduce your spider 24 hours after the build to let the enclosure stabilise.
Jumping spider enclosure setup: the quick answer
A jumping spider enclosure needs 1-2 cm of coco coir, a sphagnum moss patch in one corner, two or three cork bark pieces, diagonal twigs for climbing routes, and small artificial plants in the upper half. Use a front-opening enclosure with cross-ventilation, keep humidity at 40-60%, and mist one wall every 48 hours.
Choosing the right enclosure
Size and type
Jumping spiders are arboreal: they live, hunt, and sleep in the upper half of their enclosure. Height matters far more than floor space. The standard advice is an enclosure at least twice as tall as it is wide.
Practical minimum sizes by life stage:
| Life stage | Minimum enclosure size |
|---|---|
| Spiderling (under 1 cm) | Small deli cup or pill vial, 100-250 ml |
| Juvenile (1-2 cm) | 15 x 15 x 20 cm or equivalent |
| Sub-adult / adult | 20 x 20 x 30 cm (a Nano Tall footprint or similar) |
A common beginner mistake is starting adults in a deli cup “because the spider is small.” An enclosure that is too small limits hunting behaviour, causes stress, and makes humidity management harder. Err toward the larger size.
Can an enclosure be too big? Yes, but you have to go quite large before it becomes a problem. Most adult jumping spiders do fine in enclosures up to 30 x 30 x 45 cm, as long as the décor fills the upper portion. The concern is not size itself; it is leaving large empty sections where the spider has nothing to climb or anchor silk to.
Front-opening vs. top-opening
Front or side openings are strongly preferred. Jumping spiders build their retreat sacs in the top corners. Reaching in through a top door disrupts the retreat and stresses the spider every single time. A front or side door lets you reach the feeding area, add prey, and spot-clean without ever disturbing the upper portion. Check our enclosure gear guide for specific models we have tested.
Acrylic vs. glass
Both work. Acrylic is lighter, less likely to shatter, and easier to drill if you need more ventilation holes. Glass retains humidity more consistently and is easier to clean. Either is fine for a beginner setup. Avoid all-mesh enclosures: they dry out too fast and make maintaining even 40% humidity difficult in most homes.
What you need: the shopping list
Everything here is available at pet stores, garden centres, or online.
| Item | Purpose | Approx. cost |
|---|---|---|
| Front-opening acrylic or glass terrarium, 20x20x30 cm | Main enclosure | $30-$60 |
| Coco coir brick (e.g. Exo Terra Plantation Soil) | Substrate base layer | $6-$10 |
| Sphagnum moss (dried, packaged) | Moisture retention, misting anchor | $5-$9 |
| Cork bark, flat piece and tube (2-3 pieces total) | Climbing surfaces, retreat spots | $8-$15 |
| Small artificial plants, silk or plastic (2-3) | Anchor points, visual cover, climbing texture | $5-$10 |
| Bamboo skewers or thin twigs (4-6) | Diagonal climbing routes, hammock anchors | Free to $3 |
| Small spray bottle | Misting one wall every other day | $2-$4 |
Total: roughly $55-$115 for a fully kitted enclosure.
You do not need a heat lamp, a live-plant bioactive setup, or special lighting to get started. Those are worthwhile upgrades, but not requirements.
Step-by-step enclosure setup
Work on a clean table. The whole build takes about 20 minutes.
Step 1: Rinse and dry the enclosure
Wipe the inside with a damp cloth and let it air dry completely. Never use soap or chemical cleaners. Any residue can harm your spider.
Step 2: Add the substrate
Soak the coco coir brick in warm water to break it apart, then squeeze out as much moisture as possible before adding it. The coir should feel barely damp, not wet. Spread 1-2 cm evenly across the floor. This is your humidity buffer, not a moisture reservoir. It should never be waterlogged.
Step 3: Add a sphagnum moss patch
Place a small clump of sphagnum moss in one bottom corner. This becomes your misting zone: the spot you dampen every 48 hours. Concentrating moisture in one corner gives your spider a gradient to choose from. Spiders naturally move between drier and damper micro-climates, just as they would in the wild.
Step 4: Position the cork bark
Stand one flat piece of cork bark vertically against the back wall. Lay a second piece diagonally so it bridges from the substrate up to the mid-height of the enclosure. If you have a cork tube, wedge it into a corner: it makes a perfect retreat option and most spiders will investigate it immediately. Leave open space in the upper half for the spider to web between surfaces.
Step 5: Add twigs and bamboo skewers
Push two or three bamboo skewers (or thin dry twigs) into the substrate at diagonal angles across the upper two-thirds of the enclosure. These become jumping-off points and silk anchors. Cross two of them near a top corner: your spider will very likely choose that junction as its first retreat sac location.
Step 6: Add the artificial plants
Tuck small silk or plastic plants around the cork bark and near the diagonal skewers. Rinse them under water before installing to remove any dust or packaging residue. They reduce line-of-sight stress, add gripping texture, and give your spider places to stalk prey from cover.
Step 7: Check the ventilation
The enclosure needs airflow from two directions: cross-ventilation. Most front-opening terrariums have a mesh top and mesh side panels; that combination is ideal. If you are using a deli cup or tub with only a mesh lid, add a row of 2 mm holes in the upper sides before introducing your spider. Use a pin vice or a heated pin. Cold-drilling acrylic cracks; warm is better.
Step 8: No water dish
Jumping spiders drink from droplets on enclosure walls and plants. A standing water dish is a drowning hazard. Misting provides everything they need.
Step 9: Place the enclosure
Set it somewhere that gets bright, indirect light for several hours a day. An east-facing windowsill that catches morning light is ideal. Avoid south- or west-facing windows in summer: glass amplifies heat and an enclosure can reach lethal temperatures in under an hour.
Step 10: Wait 24 hours
Let the enclosure settle at room temperature. Check that the substrate feels barely damp and the sphagnum moss is slightly moist but not soaking. Then introduce your spider.
Choosing and layering the substrate
Coco coir (coconut fibre) is the standard choice. It holds a small amount of moisture, drains well, looks naturalistic, and is safe if accidentally ingested. Exo Terra Plantation Soil and Komodo Coco Soil are both widely available.
Sphagnum moss layered over the coir in one corner extends your misting window. It stays damp longer than loose coir and releases moisture slowly into the air above it.
Avoid: sand, gravel, pebbles, and potting compost. Sand and gravel are abrasive to a spider’s feet and can get into book lungs. Potting compost contains fertilisers and pesticides. See the substrate guide for a deeper comparison of every option.
Layer depth: 1-2 cm is enough. Jumping spiders do not burrow. A deeper substrate just holds more moisture than you need and increases mould risk.
Climbing structures and décor
The upper two-thirds of the enclosure matters most. Jumping spiders spend the majority of their time above floor level. Design the top of the enclosure first and fill in from there.
Cork bark is the single best décor investment. Lightweight, non-toxic, holds surface moisture without staying wet, with natural crevices that spiders use as retreats. A flat piece propped against the back wall plus a tube wedged into a corner is a complete climbing setup for most adult enclosures.
Artificial plants do everything real plants do for enrichment and climbing texture, without the risk of toxic soil amendments or overwatering. Stick to silk or quality plastic. Avoid anything with wire stems that could snag a leg.
Twigs and bamboo skewers fill the diagonal mid-space. Jumping spiders rarely travel in straight lines from floor to ceiling. They hop across an obstacle course. More crossing angles means more confident hunting and exploring behaviour.
If you eventually want to upgrade to a living setup, the bioactive jumping spider enclosure guide and terrarium plants guide cover that in detail.
Humidity and ventilation
Ambient humidity for most commonly kept species, including Phidippus regius, should sit at 40-60%. This is close to ordinary room humidity in most homes, which is part of why jumping spiders make such good pets.
The misting schedule: lightly mist one wall and the sphagnum moss corner every 48 hours. Never soak the enclosure. A correct misting dries within a few hours. If moisture is still beading on the glass after four hours, you misted too heavily.
Cross-ventilation prevents mould. Still air in a humid enclosure grows mould within days. If you see white fuzzy growth on the substrate or décor, increase airflow first before cutting back on misting. Adding side holes is usually all it takes. See the dehydration guide for signs your spider is not getting enough humidity.
During moulting, raise humidity briefly to 70-80%. Full details are in the molting guide.
Where to place the enclosure
Jumping spiders are diurnal. They are active during daylight and need a clear day/night cycle to stay healthy long-term.
Good spots:
- East-facing windowsill for morning light (gentle, not overheating)
- A shelf 60-90 cm from a bright window
- Under a full-spectrum LED desk lamp on a 12-hour timer
Spots to avoid:
- South- or west-facing windows in summer (overheating risk is real and fast)
- Near radiators or air-conditioning vents (temperature swings cause stress)
- High-traffic areas where the enclosure gets knocked or frequently disturbed
- Anywhere that drops below 16°C at night consistently
Room temperature of 18-26°C is fine for the vast majority of commonly kept species. You do not need a heat mat or heat lamp unless your home regularly dips below 16°C in winter.
What not to put in the enclosure
These are common beginner purchases that can harm your spider:
- Sand or gravel substrate: abrasive to feet and book lungs, holds no useful humidity
- Treated or painted wood: off-gassing chemicals are toxic to spiders
- Live crickets or roaches left unattended overnight: uneaten feeder insects can bite, stress, or injure a moulting spider
- Essential oil diffusers or scented candles nearby: airborne terpenes and volatile compounds are harmful to arachnids
- Water dishes: drowning hazard; droplets from misting are sufficient
- Cohabitants: jumping spiders are solitary and cannibalistic. One spider per enclosure, always
- Wild-caught plants or moss: may carry pesticides, mites, or fungal spores; use commercially packaged sphagnum moss only
- Live moss from the garden: same risk as wild plants; not worth it when dried packaged moss works just as well
FAQ
How big should a jumping spider enclosure be? For a typical adult jumping spider, a 20 x 20 x 30 cm front-opening enclosure is the standard starting point. Height matters more than floor space because these spiders are arboreal. Juveniles do well in something smaller (15 x 15 x 20 cm), and spiderlings can start in small deli cups or pill vials of 100-250 ml. Upgrade the enclosure each time your spider molts into a noticeably larger size.
Can a jumping spider enclosure be too big? Yes, but you have to go quite large before it is actually a problem. The issue is not square footage; it is empty vertical space with nothing to climb. An enclosure that is 30 x 30 x 45 cm can work perfectly if you fill the upper two-thirds with cork bark, plants, and crossing twigs. An enclosure of the same size with bare walls and a single stick will stress the spider and make it harder to find prey.
What substrate should I use for a jumping spider enclosure? Coco coir (coconut fibre) is the best all-round choice: affordable, safe if ingested, good at holding a light amount of moisture without getting waterlogged. Layer 1-2 cm across the floor and add a sphagnum moss patch in one corner as your misting anchor. Avoid sand, gravel, and potting compost.
Do jumping spiders need live plants in their enclosure? No. High-quality artificial silk or plastic plants do the same job: visual cover, climbing texture, anchor points for silk. Live plants look great and work well in a bioactive setup, but they are an upgrade, not a requirement. If you want to go bioactive, the bioactive setup guide covers the transition properly.
How do I maintain humidity in a jumping spider enclosure? Mist one wall and the sphagnum moss corner lightly every 48 hours. A correct misting dries within a few hours. Target 40-60% ambient humidity. If you see mould, improve ventilation (add side holes) before cutting back on misting. If your spider is pressing against the glass or the substrate is bone dry, increase misting frequency slightly.
Can jumping spiders escape their enclosure? Yes, easily, if there is any gap large enough for them to fit through. They can squeeze through surprisingly small spaces and can walk across almost any surface. Always check that the enclosure door closes securely and that mesh panels have no tears. A spider that escapes the enclosure is rarely recoverable in a typical home.
Next steps
Once the enclosure is ready, the next question is what to feed your spider and how often. The jumping spider feeding guide covers prey sizing, feeding frequency by life stage, gut-loading, and what to do when your spider refuses food.
If you are keeping a Phidippus regius specifically, the Phidippus regius care guide covers species-specific humidity and size considerations beyond a generic setup. For a bold jumping spider, see the Phidippus audax care guide.