---
title: Cookie jar ferns: a jar forest terrarium recipe
description: An easy sealed jar forest in a cookie of 3.5 L, with 3 plants and 2 mosses. a wide cookie jar with a glass dome lid Every layer, plant and moss, and the jar...
url: https://glassjar.garden/starter-jars/cookie-ferns/
---

Starter jar · easy

# Cookie jar ferns
jar forest

easy · Sealed · cookie

An easy sealed jar forest in a cookie of 3.5 L, with 3 plants and 2 mosses.

[Open this jar in the simulator](https://glassjar.garden/?starter=cookie_ferns)

## The container

- Glass: cookie, 18 cm across, 15 cm tall, 3.5 L

- Note: a wide cookie jar with a glass dome lid

- Lid: Sealed

## Layers, bottom to top

- [LECA (expanded clay)](https://glassjar.garden/guide/soils/leca/), 2 cm (0.46 L)
- [Substrate barrier mesh](https://glassjar.garden/guide/soils/mesh-barrier/)
- [ABG mix](https://glassjar.garden/guide/soils/abg-mix/), 5 cm (1.16 L)

## Stones and wood

- [Mountain stone](https://glassjar.garden/guide/hardscape/mountain-stone/), about 6 cm

## Plants

- [Peacock spikemoss](https://glassjar.garden/guide/plants/selaginella-uncinata/)
- [Mini nerve plant](https://glassjar.garden/guide/plants/fittonia-mini/)
- [Baby tears pilea](https://glassjar.garden/guide/plants/pilea-depressa/)

## Moss

- [Many-fruited thyme-moss](https://glassjar.garden/guide/moss/plagiomnium-affine/), about 35% cover
- [Fern moss](https://glassjar.garden/guide/moss/thuidium-delicatulum/), about 20% cover

## Cleanup crew

- 60 [Temperate white springtail](https://glassjar.garden/guide/critters/folsomia-candida/)

## Water and light

- Water at build: 320 ml, distilled or rain

- Watering: mist only when no morning condensation

- Light: 3,000 lux, 12 h a day

- Light source: bright indirect window

## How to make it

- Pour the layers, bottom to top: LECA (expanded clay) (2 cm), Substrate barrier mesh, ABG mix (5 cm).
- Set the hardscape: Mountain stone.
- Plant Peacock spikemoss, Mini nerve plant, Baby tears pilea.
- Lay the moss: Many-fruited thyme-moss over about 35% of the ground, Fern moss over about 20% of the ground.
- Add the cleanup crew: 60 Temperate white springtail.
- Water with 320 ml (distilled or rain).
- Close the lid and give it 3,000 lux, 12 h a day: bright indirect window.

[Open this jar in the simulator](https://glassjar.garden/?starter=cookie_ferns)

[Test tube moss](https://glassjar.garden/starter-jars/test-tube/) · [Moss and stone](https://glassjar.garden/starter-jars/moss-and-stone/) · [All starter jars](https://glassjar.garden/starter-jars/)