---
title: Brocade moss in a terrarium | Glass Jar Garden
description: Brocade moss (Callicladium imponens): Golden feathery mats with red stems. Needs light 2,000 to 20,000 lux, humidity 60 to 95 % RH, temperature 8 to 25 °C.
url: https://glassjar.garden/guide/moss/hypnum-imponens/
---

Moss

# Brocade moss
Callicladium imponens

Easy · Fine in a closed jar

Golden feathery mats with red stems.

## What the simulation uses

- Light: 2,000 to 20,000 lux (The brightness it grows well in.)

- Humidity: 60 to 95 % RH (Air moisture it is happy in; below the lower end it dries out.)

- Temperature: 8 to 25 °C (Comfortable range; outside it growth slows.)

- Dies at: below -25 or above 44 °C (Days beyond these temperatures kill it.)

- Soil pH: 3.5 to 4.5 pH (Soil acidity it prefers.)

- Grows up: 0.02 cm/month (How fast it gains height in good conditions.)

- Spreads: 0.13 cm/month (How fast its edge creeps outwards.)

- Thickens: 2.5 %/month (How fast its cover fills in on its own ground.)

- Copes with wet: fair (How well it stands soggy soil; poor means rot comes quickly.)

- Copes with still air: good (Sealed jars have still air; poor means grey mould finds it.)

- Copes with shade: fair (How well it holds on in dim light.)

- Copes with drying: good (How well it survives the jar drying out.)

- Water use: 0.04 ml/cm²/day (Water that evaporates off the cushion each day in room air.)

- Holds water: 0.2 ml/cm² (Water a cm² of moss soaks up and keeps.)

- Grows on: soil, wood (Where it can take hold and spread. Moss that cannot grow on stone thins out there.)

## Care

- Day length: 10 to 14 h

- Substrate: Moist

## What kills it

- lime
- deep shade
- waterlogging

## Description
A common source of sheet moss in North America, it naturally grows in bright, wet, very acid places. Keep lime away from it and give it good light, since deep shade and waterlogging both hurt it.

Also called Hypnum imponens, flat sheet moss, sheet moss.

Estimated, where sources were thin: growth rate; temp ranges; photoperiod_h.

## Sources

- [en.wikipedia.org/wiki/Hypnum_imponens](https://en.wikipedia.org/wiki/Hypnum_imponens)
- [nora.nerc.ac.uk/id/eprint/1131/1/BRYOATT.pdf](https://nora.nerc.ac.uk/id/eprint/1131/1/BRYOATT.pdf)

[Grow it in a jar](https://glassjar.garden/?guide=moss/hypnum-imponens)

[Blunt-leaved bogmoss](https://glassjar.garden/guide/moss/sphagnum-palustre/) · [Christmas moss](https://glassjar.garden/guide/moss/vesicularia-montagnei/) · [All moss](https://glassjar.garden/guide/moss/)