Moss guide: cushion, silver, reindeer and dried moss for your terrarium

Moss for a terrarium comes in three states: live (cushion moss and silver moss, both need occasional misting), preserved (reindeer moss, treated so it stays soft without ever needing water), and dried (Tillandsia/Spanish moss and flat moss, air-dried and purely decorative). Urbanjngl carries all of them: live cushion moss in three sizes, live silver moss in a wooden or plastic tray, preserved reindeer moss in green and dark green, dried Tillandsia, and a dried flat moss sheet. If your terrarium has live plants you're already watering, cushion or silver moss fits right in. If it doesn't get watered at all, reach for reindeer moss, flat moss or Tillandsia instead.

If you've ever stood in front of a terrarium build wondering which little bag or tray of green (or silvery-green) stuff to add, this guide sorts it out: what each moss actually is, which ones need a spray bottle and which ones you can leave alone indefinitely, and how to use them so the terrarium looks intentional.

What "moss" actually means here

Not everything sold as moss is botanically a moss, and that distinction matters for how you treat it. Cushion moss and silver moss are true mosses (cushion moss is Leucobryum glaucum), small non-vascular plants that absorb water through their surface rather than through roots, which is exactly why misting works and why they dry out fast without it. Reindeer moss is not a moss at all. It's a lichen, a combination of fungus and algae that naturally grows on forest floors in colder climates. It gets harvested, cleaned and preserved with a glycerine-based solution so it stays soft and holds its colour without ever needing water again. Dried Tillandsia, sold as Spanish moss, isn't a moss either. It's a flowering plant in the pineapple family that grows as thin hanging strands and gets air-dried for decorative use. None of this changes how good any of them look in a terrarium, but it explains why "just mist it" is right for some and a bad idea for the others.

The moss types on urbanjngl

• Cushion moss / bun moss (Leucobryum glaucum): live, grows in rounded clumps, bright green, needs regular misting and drains best on soil, pebbles or gravel. Available as a 2-piece bag of cushion moss for small gaps, in bags of 3 to 15 pieces of cushion moss, or as a full tray of cushion moss for covering a larger base.
• Silver moss: also live, with a soft silvery-grey tone that reads differently to the eye than green cushion moss. It arrives in a ready-to-use tray, either the wooden tray of silver moss (23 x 15.5 x 11.5 cm) or the larger plastic tray of silver moss (about 0.12 m² total). You can leave it in the tray as a standalone accent or lift it out to use inside a terrarium.
• Reindeer moss: preserved lichen, soft and springy, holds its shape and colour without water, light or trimming. Available in green reindeer moss and dark green reindeer moss, 50 g bags.
• Flat moss: dried, sold as a flat sheet roughly 30 x 20 cm rather than in clumps, ready to cut or tear to size. That's the flat moss box, built for open terrariums, table settings and craft projects where you want an even ground layer rather than bumpy cushions.
• Dried moss / dried Tillandsia (Spanish moss): air-dried, soft grey-green strands, purely decorative, not a live plant material. That's the dried Tillandsia moss.
• Forest mix: a bonus one worth knowing about if moss is just part of what you need. It's a dried mix of moss, pinecones, wood and bark covering about 0.75 m², built for a woodland-floor look rather than a single moss type.

Where each type of moss actually comes from

Cushion moss (Leucobryum glaucum) is sometimes called pincushion moss, and it grows naturally on shaded, acidic woodland floors across Europe. Its leaves have large, empty water-storage cells, which is also why it looks pale green to almost white when dry and turns a much deeper, richer green as soon as it takes up water again, the same reaction you'll see after misting it.

Reindeer moss isn't harvested from reindeer farms, despite the name. It grows wild on forest floors and tundra across northern Europe, much of it in Finland, and it's one of the main winter food sources for actual reindeer, which is where the name comes from. It's hand-harvested, then cleaned and treated with a glycerine-based solution so it stays soft and holds its colour indefinitely instead of turning brittle the way it would if it were simply air-dried.

Dried Tillandsia, or Spanish moss, isn't native to Europe at all. It grows naturally as an epiphyte, a plant that lives on other plants without taking nutrients from them, draped over tree branches across the southeastern United States and parts of Central and South America.

Silver moss and flat moss are both sold under trade names rather than a single fixed botanical species. The ornamental moss trade tends to select and grow moss for a particular look, the silvery-grey tone or an even, flat growth habit, rather than market it by species the way cushion moss or Tillandsia are.

Live, preserved or dried: which one does your terrarium need

If your terrarium has actual live plants and you're watering or misting it anyway, cushion moss or silver moss fits right into that routine and keeps growing along with everything else. Both also do the most for a closed or semi-closed terrarium, since they thrive in the humidity that builds up inside. If you're building something with dried elements, artificial plants, or a display that won't get watered at all, reindeer moss, flat moss or dried Tillandsia are the better call: none of them rot, need light, or change from the day you place them. The difference between the two non-live options is mostly texture: reindeer moss stays soft and cushion-like because of how it's preserved, while flat moss and Tillandsia are crisper and papery since they're simply air-dried.

Quick rule of thumb: if you'd water the rest of the terrarium, use cushion or silver moss. If you wouldn't, use reindeer moss, flat moss or Tillandsia instead.

How to use moss in a terrarium

Cushion moss and silver moss both work best pressed directly onto damp soil, gravel or sand, as long as there's drainage underneath so they don't sit in standing water. Snug cushion moss clumps up against each other to keep their rounded shape, or break pieces apart to fill smaller gaps. Silver moss lifts easily out of its tray if you want to tuck it in around plants instead of leaving it on display as-is; its grey tone works well as a contrast next to green cushion moss or live plants rather than as the only moss in the build.

Flat moss is the one to reach for when you want an even, all-over ground layer instead of a clumpy or bumpy one, since it comes as a sheet you cut or tear to size. Reindeer moss and dried Tillandsia are more about finishing touches: tuck reindeer moss around the base of plants to hide soil or fill gaps between rocks, and layer dried Tillandsia loosely across the top for texture and colour without adding weight or moisture. Because none of the three need light or water, they also work in spots a live moss never could, like right up against the glass or tucked under an overhang.

Beyond the terrarium

Reindeer moss, flat moss and dried Tillandsia don't have to stay inside glass at all. Reindeer moss works well pressed into the top of a houseplant pot to hide the soil, tucked into a wreath or table centrepiece, or layered into a bowl display, all without needing water once it's placed. Flat moss does the same job at a larger scale, as a base layer under a seasonal arrangement or a dried flower display. Dried Tillandsia drapes naturally over the edge of a shelf, a picture frame or a hanging planter for a softer, wilder look. If you want a fuller natural-materials mix rather than just moss, that's exactly what the forest mix is built for.

Caring for live moss (cushion and silver)

Mist regularly, more often in a warm or dry room, less often in a closed terrarium that holds its own humidity. Check that it's sitting on something that drains, since moss rotting from underneath is a much more common problem than moss drying out. Both tolerate indirect light well but scorch in direct sun. If a cushion moss piece is too big, just break it by hand: it's forgiving, and smaller fragments will still grow together over time. Browning at the edges usually means it's too dry rather than dying, so increase misting before giving up on it.

Caring for reindeer moss, flat moss and dried Tillandsia

The appeal here is that there's genuinely nothing to do. Keep all three out of direct sunlight so the colour doesn't fade over time, and don't mist or water them: the preserving solution in reindeer moss can start to weep or turn sticky if it gets wet, and flat moss or Tillandsia will simply go limp or start to mould. If any of them look dusty after a while indoors, a light shake or a quick pass with a soft brush is all they need.

Which moss for which project

• Filling a live plant terrarium or mini-ecosystem: cushion moss, the 2-piece bag for small gaps, the multi-bag option for bigger builds, or the full tray for covering a larger base.
• A silvery accent piece or contrast next to green plants: silver moss, in the wooden tray for a small display or the plastic tray if you need more surface area.
• A gift terrarium, dried display, or something that won't be watered: reindeer moss in green or dark green.
• An even, all-over ground layer instead of clumps: flat moss.
• Adding texture to a dried arrangement, table decoration or bowl display: dried Tillandsia.
• A full woodland-floor look with more than just moss: the forest mix.

Moss types at a glance

Moss type	State	Needs misting	Typical use	From
Cushion moss	Live	Yes, regularly	Ground cover, mounds and hills in live terrariums	€2.95
Silver moss	Live	Yes, occasionally	Silvery accent, standalone or in a terrarium	€9.95
Reindeer moss	Preserved	Never	Filling gaps, gifts, dried displays	€4.50
Flat moss	Dried	Never	Even ground layer, table settings	€5.95
Dried Tillandsia	Dried	Never	Texture, draping, dried arrangements	€4.95

Prices shown are for the smallest available size of each.

No terrarium yet?

If you're starting from nothing, browse our terrarium DIY kits for bottles and kits to fill, or check terrarium plants if moss is just one part of a bigger build.

FAQ

Is reindeer moss real moss?
No. It's a lichen, not a moss, though it's sold and used the same way. That's also why it behaves so differently: it's preserved rather than alive, so it doesn't need water, light or any care at all.

Where does reindeer moss actually come from?
Mostly northern Europe: it grows wild on forest floors and tundra in places like Finland, where much of the reindeer moss sold in the decor trade, ours included, is sourced. It's hand-harvested rather than farmed.

Do I need to water preserved or dried moss?
No, and you shouldn't. Reindeer moss, flat moss and dried Tillandsia are all treated or dried to hold their look without water. Adding moisture can make reindeer moss go sticky or cause the others to mould.

How often should I mist live cushion or silver moss?
Enough to keep it from drying out, which depends on your room and your terrarium. In an open tray in a dry room, that might be every few days. In a closed, humid terrarium, it often needs almost no misting at all. Check the moss itself rather than following a fixed schedule: if it's turning pale or crispy, mist it.

What's the difference between flat moss and cushion moss?
They're two different products with two different looks. Cushion moss is live and grows in rounded, bumpy clumps. Flat moss is dried and comes as an even sheet, better suited to a smooth, all-over ground layer than a textured one.

Can silver moss go in a closed terrarium?
Yes. Since it's a live moss, it benefits from the humidity a closed terrarium holds, the same as cushion moss. Lift it out of its tray first if you want to work it into the display rather than leaving it in the tray.

Can I mix different moss types in one terrarium?
Yes, and it often looks better than one type on its own. A common combination is live cushion moss for the main ground cover with a little preserved reindeer moss tucked into gaps or against the glass, since the reindeer moss won't mind the drier spots a live terrarium sometimes has.

Why is my reindeer moss going stiff or crumbly?
That usually means it's been exposed to direct sun, heat, or very dry air over a long period, which dries out the preserving solution. It's a sign of age or environment rather than something you did wrong, and it's not reversible.

Is dried Tillandsia the same as Spanish moss?
Yes, Spanish moss is the common name for dried Tillandsia usneoides. Despite the name, it isn't a moss either: it's a flowering air plant, related to pineapples, that's air-dried for decorative use.

Is preserved or dried moss safe around pets?
Treat it the same as any dried floral or craft material: it isn't made to be eaten, and the glycerine-based solution in preserved reindeer moss isn't intended for consumption. Keep it out of reach if you have a pet or small child that chews on decor.