Early Goldenrod
Invasive Species Information

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What Is Early Goldenrod - (Solidago gigantea)?

Habitat: Terrestrial
Distribution in Ireland: Widespread

Status: Established

Family name: Asteraceae

Common name/s: Giant Goldenrod, Tall Goldenrod

Reproduction: Self-sterile and insect-pollinated. Sometimes spreading by means of underground rhizomes.

Clover broomrape Biodiversity Medium Risk Invasive Species 14

Early Goldenrod #1

In its native habitat, Early Goldenrod can occur in any crop, but is not a serious weed in annual crops since it can be controlled by tilling.

 

However, it invades poorly managed pasture, dry meadows, wetland edges, rail sides, roadsides and wasteland.

Early Goldenrod has a broad climate tolerance and can invade any uncultivated areas.

Early Goldenrod - (Solidago gigantea)

Early Goldenrod is a perennial herb that reaches heights of up to 2m tall, sometimes spreading by means of underground rhizomes. It often grows in clumps with no leaves at the base but numerous leaves on the stem. At the top, each stem produces a sizable array of many small flower heads, sometimes several hundred. Each head is yellow, containing both disc florets and ray florets.

 

In late summer it produces small yellow flowers in a flat cluster display at the top of a tall arching, leafy and smooth stem.

 

Early Goldenrod is highly invasive throughout Europe. In its non-native range, it exerts a negative impact on native communities by decreasing species diversity, due to its intense competitive effects and rapid growth. 

 

In the non-native European range, several management options are applied, such as periodical flooding, mowing, mulching, grazing, or herbicide to reduce the negative impact of the species on native biodiversity

How To Identify Early Goldenrod?

Clover broomrape Biodiversity Medium Risk Invasive Species 14

Early goldenrod - Solidago gigantea  ID Guide

Leaf: Green 
Flower: Small Yellow Flowers
Stem: Smooth

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Early goldenrod #3

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Early goldenrod #4

Why Is Early goldenrod A Problem?

Early Goldenrod is an invasive alien plant species (IAPS), meaning it out-competes crowds-out and displaces beneficial native plants that have been naturally growing in Ireland for centuries.

 

Herbicide is often used to reduce the negative impact of the species on native biodiversity.

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European Communities (Birds and Natural Habitats) Regulations 2011 non-native invasive plant species A-Z (Updated 2017)


There are currently 35 invasive plant species listed in the European Communities (Birds and Natural Habitats) Regulations (annex 2, Part 1)...
 
Click on a species from the following list to find out more regarding non-native species subject to restrictions under Regulations 49 and 50.

Additional Non-Native Plant Species identified as Medium Risk on Ireland's Biodiversity List...

Common name 

African woodsorrel

American skunk cabbage

Annual bur-sage

Antithamnionella ternifolia

Barberry

Black currant

Brazilian waterweed

Butterfly-bush

Canadian-fleabane

Clover broomrape

Creeping Bellflower

Dead man's fingers

Douglas fir

Early goldenrod

False acacia

Field penny-cress

Garden lupin

Giant rhubarb

Hairy rocket

Himalayan honeysuckle

Himalayan knotweed

Holm oak

Japanese barberry

Japanese honeysuckle

Japanese rose

Leafy spurge

Least duckweed

Narrow-leaved ragwort

New Zealand bur

Ostrich fern

Pampas grass

Pitcherplant

Red oak

Red sheath tunicate

Rock cotoneaster

Rum cherry

Russian-vine

Salmonberry

Sea-buckthorn

Sycamore

Three-cornered garlic

Traveler's-joy

Tree of heaven

Turkey oak

Virginia-creeper

Warty cabbage

Water fern

Wild parsnip

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