# Woad (*Isatis L.*)

Woad is a plant known for its brilliant blue dye. People have used it for coloring fabrics for a long time. The leaves of the woad plant are harvested to create the dye.

- **Category:** [Plants](https://www.snappit.app/explore/categories/plant)
- **Rarity:** Rare
- **Danger:** 2/5 · Low
- **Habitat:** Grasslands
- **Also known as:** Isatis, Isatis tinctoria

![Woad](https://commons.wikimedia.org/w/index.php?title=Special:Redirect/file/Isatis_tinctoria02.JPG&width=800)

Photo: CC BY-SA 3.0 · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Isatis_tinctoria02.JPG)

## Appearance

The Woad is a tall, erect plant with distinct bluish-green leaves. Its small, four-petaled flowers are a vibrant bright yellow, growing in dense clusters at the top of its stems, creating a striking contrast against its foliage.

## Taxonomy

- **Kingdom:** Plantae
- **Phylum:** Tracheophyta
- **Class:** Magnoliopsida
- **Order:** Brassicales
- **Family:** Brassicaceae
- **Genus:** Isatis

## Interesting facts

- Before indigo, woad was Europe's main source for blue dye, coloring royal clothing!
- Making woad dye involves a stinky fermentation process, like brewing a potent, bubbly tea!
- Woad seeds can stay alive in the soil for years, waiting for the perfect moment to sprout!
- Woad was so valuable that special 'woad mills' processed its leaves into blue dye!

## Special abilities

- **Dye Master:** Woad can create a vibrant blue pigment that helps humans color textiles and inks for centuries.
- **Resilient Pioneer:** Woad can thrive in disturbed soils and roadside edges, helping it colonize new, open areas effectively.
- **Medicinal Maker:** Woad has compounds used in traditional medicine, helping people treat various ailments and infections.

## Measurements & details

- **Height:** 30-150 cm
- **Spread:** 30-60 cm
- **Flower Size:** 0.3-0.5 cm
- **Bloom Season:** Late spring to early summer
- **Edible:** Yes
- **Toxicity:** Mild
- **Lifecycle:** Biennial
- **Pollination Method:** Insect

## Ecological connections

- **Pollinates:** Honey bee (*Apis mellifera*) — Visits its bright yellow flowers for nectar.
- **Eaten by:** Small white butterfly (*Pieris rapae*) — Its caterpillars feed on the plant's leaves.
- **Eaten by:** Diamondback moth (*Plutella xylostella*) — Larvae are a common pest of woad.

## Traits

- [Biennial](https://www.snappit.app/explore/traits/biennial): Biennial plants complete their life cycle over two growing seasons, typically forming foliage in the first year and flowering/seeding in the second.
- [Cluster Flower](https://www.snappit.app/explore/traits/cluster-flower): Cluster flowers are inflorescences where individual flowers are arranged closely together on a common stem.
- [Dye](https://www.snappit.app/explore/traits/dye): This human use trait indicates species from which natural dyes can be extracted and used to color textiles, food, or other materials.
- [Grassland](https://www.snappit.app/explore/traits/grassland): Grassland habitats are terrestrial biomes dominated by grasses and herbaceous plants, supporting a variety of grazing animals.

## Collections

- [Fungi](https://www.snappit.app/explore/collections/fungi)
- [Plants](https://www.snappit.app/explore/collections/plants)

## Safety

**Danger:** 2/5 · Low

Avoid touching or consuming woad plants without adult supervision.

## Frequently Asked Questions

### How to identify Woad?

Start with the whole plant, then compare leaf arrangement, leaf edges, stems and any flowers or fruit. Opposite leaves grow in pairs; alternate leaves come one at a time along the stem. These details tell you far more together than a single green leaf does. Plant Identifier: upload a photo and compare the visible details.

### How tall is Woad?

30-150 cm

### How wide does Woad spread?

30-60 cm

### How big are the flowers on Woad?

0.3-0.5 cm

### When does Woad bloom?

Late spring to early summer

### Is Woad edible?

Yes

### Is Woad toxic?

Mild

### What is Woad's lifecycle?

Biennial

## Where to spot

- [Wangeliner Garten](https://www.snappit.app/guides/places/wangeliner-garten) — Mecklenburg-Vorpommern, DE · Park

## More Plants

- [white snakeroot](https://www.snappit.app/explore/white-snakeroot) (*Ageratina altissima*)
- [tree-of-heaven](https://www.snappit.app/explore/tree-of-heaven) (*Ailanthus altissima*)
- [western sword fern](https://www.snappit.app/explore/western-sword-fern) (*Polystichum munitum*)
- [common milkweed](https://www.snappit.app/explore/common-milkweed) (*Asclepias syriaca*)

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Source: [Woad: Characteristics, Facts & Places to See — Snappit](https://www.snappit.app/explore/woad)