---
title: White fuzzy mycelium in a terrarium | Glass Jar Garden
description: White fuzzy mycelium (new-wood bloom): White fuzz on new wood and soil in the first weeks. Springtails clear it.
url: https://glassjar.garden/guide/moulds/white-saprophytic-mycelium/
---

Moulds and films

# White fuzzy mycelium (new-wood bloom)

White fuzz on new wood and soil in the first weeks. Springtails clear it.

## Care

- Air humidity: 85 to 100%

- Temperature: 15 to 30 °C

## Description
Cottony white threads spread over fresh wood, cork and leaf litter, the classic bloom of a jar's first weeks. It never harms plants and fades as the wood's easy sugars run out, usually within six weeks. Isopods and a little airflow speed that up.

Also called white fuzz, new wood mould, white mould on driftwood.

Estimated, where sources were thin: spread_cm_per_day; typical_duration_days (hobby consensus, no measured source); temp_c.

## Sources

- [en.wikipedia.org/wiki/Mycelium](https://en.wikipedia.org/wiki/Mycelium)
- [en.wikipedia.org/wiki/Wood-decay_fungus](https://en.wikipedia.org/wiki/Wood-decay_fungus)

[Grow it in a jar](https://glassjar.garden/?guide=moulds/white-saprophytic-mycelium)

[Sooty mould](https://glassjar.garden/guide/moulds/sooty-mould/) · [Yellow houseplant mushroom](https://glassjar.garden/guide/moulds/leucocoprinus-birnbaumii/) · [All moulds and films](https://glassjar.garden/guide/moulds/)