A dart frog vivarium is a planted tank first and an animal enclosure second. The plants create the humidity, the cover, and the microclimates the frogs use. They also make the tank look like a place rather than a box.
The plants below are the ones that work in a warm, wet, moderately lit rainforest vivarium.
The canopy: bromeliads
Bromeliads are the backbone of a dart frog tank. Their central cups hold water, and dart frogs use them as calling sites and tadpole pools.
- Neoregelia species: colorful, compact, and tolerant of a range of light.
- Vriesea and Guzmania: larger, good for a background wall.
- Cryptanthus: terrestrial, low, and star-shaped; good for the floor.
Mount bromeliads on cork bark or wood, or set them in the upper substrate with the crown above the soil. Keep the cup full of clean water, but do not let the roots sit in a swamp.
The midground: ferns and broad leaves
- Button fern (Pellaea rotundifolia): small, arching, tolerant of lower light.
- Bird's nest fern (Asplenium): a bigger statement plant for a large tank.
- Fittonia: low, colorful, and happy in high humidity.
- Peperomia: compact, ridged leaves; let the surface dry slightly between mistings.
- Begonia: patterned foliage; needs airflow and no water sitting on the leaves.
These plants fill the space between the floor and the canopy. Plant them in the substrate, not in standing water.
The floor: moss and leaf litter
- Live moss: holds humidity, gives springtails cover, and softens the edges.
- Selaginella: a fern-like carpet for consistently wet spots.
- Leaf litter: not a plant, but part of the floor. It feeds the cleanup crew and gives the frogs cover.
A moss carpet is not essential, but it helps a small tank hold humidity. Keep it evenly moist; dry moss turns brown and does not recover quickly.
The vertical layer: vines and epiphytes
- Pothos: fast, forgiving, and good for softening cork bark.
- Philodendron: similar; trim before it covers the light.
- Tillandsia: air plants for the upper hardscape; need airflow and a dry period after misting.
- Jewel orchid: a slow, dark-leaved terrestrial orchid for a shady corner.
Vines can take over a small tank. Plant one, not five, and trim it before it shades the bromeliads.
How many plants?
A new vivarium should look slightly underplanted, not full. Plants need room to grow, and the cleanup crew needs open leaf litter. For a 45 × 45 × 60 cm tank:
- 1–2 bromeliads
- 2–3 ferns or broad-leaf plants
- 2–3 moss patches
- 1 vine
- 1–2 small accent plants
That is enough to create cover and humidity without turning the tank into a solid green wall.
Planting rules
- Keep the rhizome above the substrate. Anubias and many ferns rot if buried.
- Mount epiphytes on wood or cork. Bromeliads and tillandsias do not need soil.
- Leave the front open. You want to see the frogs and the leaf litter.
- Quarantine new plants. Rinse them, remove pests, and keep them separate for a week if you can.
- Avoid fertilizer and pesticides. Both are dangerous in a small, wet tank.
Light
Most of these plants want low to medium light, 8–10 hours a day. A bright window or a small LED is enough. Direct sun overheats the tank and grows algae on the glass.
If the plants are leggy and pale, the light is too low. If the glass is green within a week, the light is too high or the nutrients are too high.
A planted tank is a process
The first planting will not be the final planting. Some plants will thrive, some will melt, and the moss will spread into places you did not plan. That is part of the hobby. Start with reliable species, keep the tank slightly underplanted, and let it grow into itself.