Invasive Species: Yellow Archangel

Lamiastrum galeobdolon

Yellow archangel inhabits moist soil habitats and can send above ground roots (stolons) up to a meter.

Why is it important to control?

It has an aggressive growth habit that allows it to take over lightly shaded areas with moist, nutrient rich soils. Yellow archangel can out compete native under-story ground species.

Closeup image of yellow archangel seedlings

How can you identify it?

Close up image of yellow archangel leavesClose up image of yellow archangel flowers
Habitat: Prefers moist soils in forested parks, riparian areas, and greenbelts.
Life Cycle: Perennial
Height: 1-2 feet
Leaf Description: Oval-shaped leaves that grow opposite on stem. Hairy with toothed edges. May have silvery-grey markings.
Fruit & Flower Description: Small, yellow flowers that are two lipped.
Bloom Time: April to June

How do you control it?

  • Manually remove when soil is moist. Dispose of plant material in tied bag and place in trash.

  • Dense infestations can be controlled by sheet mulching.

How to Report it?

There are various ways you can report this noxious weed.

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