---
title: Dotted thyme-moss in a terrarium | Glass Jar Garden
description: Dotted thyme-moss (Rhizomnium punctatum): Large round translucent leaves on wet rock. Needs constant moisture. Needs light 800 to 8,000 lux, humidity 80 to...
url: https://glassjar.garden/guide/moss/rhizomnium-punctatum/
---

Moss

# Dotted thyme-moss
Rhizomnium punctatum

Moderate · Fine in a closed jar

Large round translucent leaves on wet rock. Needs constant moisture.

## What the simulation uses

- Light: 800 to 8,000 lux (The brightness it grows well in.)

- Humidity: 80 to 100 % RH (Air moisture it is happy in; below the lower end it dries out.)

- Temperature: 5 to 22 °C (Comfortable range; outside it growth slows.)

- Dies at: below -20 or above 40 °C (Days beyond these temperatures kill it.)

- Soil pH: 5 to 6.5 pH (Soil acidity it prefers.)

- Grows up: 0.1 cm/month (How fast it gains height in good conditions.)

- Spreads: 0.07 cm/month (How fast its edge creeps outwards.)

- Thickens: 1.25 %/month (How fast its cover fills in on its own ground.)

- Copes with wet: excellent (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: good (How well it holds on in dim light.)

- Copes with drying: poor (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, stone, 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: Wet

## What kills it

- drying out
- warmth above ~24 C

## Description
It grows on wet rocks, streamsides and soggy wood, standing up to 10 cm tall. Warmth above about 24 °C is a problem as well as drying. A cool spot that never dries out suits it best.

Also called thyme moss.

Estimated, where sources were thin: growth rate; temp_c.

## Sources

- [en.wikipedia.org/wiki/Rhizomnium_punctatum](https://en.wikipedia.org/wiki/Rhizomnium_punctatum)
- [ohiomosslichen.org/moss-rhizomnium-punctatum](https://www.ohiomosslichen.org/moss-rhizomnium-punctatum/)
- [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/rhizomnium-punctatum)

[Cushion moss](https://glassjar.garden/guide/moss/leucobryum-glaucum/) · [Fern moss](https://glassjar.garden/guide/moss/thuidium-delicatulum/) · [All moss](https://glassjar.garden/guide/moss/)