---
title: Cork round in a terrarium | Glass Jar Garden
description: Cork round: A hollow tube of cork bark. In the jar it has holds water 20 % by volume, pore space 45 % by volume, weight 700 g/L.
url: https://glassjar.garden/guide/hardscape/cork-round/
---

Stones and wood

# Cork round

A hollow tube of cork bark.

## What the simulation uses

- Holds water: 20 % by volume (Water it keeps after draining; the rest runs down to the drainage.)

- Pore space: 45 % by volume (Room for air and water between grains; low means roots suffocate when wet.)

- Weight: 700 g/L (How heavy a litre is.)

- pH: 5.5 to 7 pH (How acid it keeps the soil.)

## Description
A hollow tube of cork bark. Stand it upright like a stump or lay it down as a tunnel.

Also called cork tube.

Estimated, where sources were thin: look authored for the app; physical values estimated.

[Grow it in a jar](https://glassjar.garden/?guide=hardscape/cork-round)

[Cork bark](https://glassjar.garden/guide/hardscape/cork-bark/) · [Dragon stone](https://glassjar.garden/guide/hardscape/dragon-stone/) · [All stones and wood](https://glassjar.garden/guide/hardscape/)