Canadian Fleabane (Erigeron canadensis)
A fresh, herbaceous single oil steam-distilled from Erigeron canadensis, valued for its bright, energizing aromatic character.
How to use it
3–5 drops alone, or with lemon or orange for a bright, energizing morning atmosphere.
Dilute in a carrier oil and patch-test first — it has a less established topical-use history.
Safety in detail
- Max dermal use
- Dilute in a carrier oil for skin
- Phototoxic
- No
- A gentle oil; dilute before topical use. Store cool and sealed, as its high limonene oxidises over time.
- Not phototoxic. Keep out of reach of children.
Sources: JEOR study (2000)
Composition & chemistry
- Limonene 62%
- trans-α-Bergamotene 6%
- (Z)-β-Ocimene 5%
- Matricaria ester 4%
- γ-Curcumene 4%
- β-Pinene 4%
- Other minor constituents 15%
- Limonene — the dominant fresh-citrus terpene giving Canadian fleabane its bright, green-citrus aroma JEOR study (2000)
Steam-distilled Canadian fleabane (Conyza canadensis, also called Erigeron canadensis); a limonene-dominant oil with a fresh, green, slightly grassy aroma.
Source: JEOR study on the essential oil of Conyza canadensis (2000)The "fleabane" name comes from its folk use, burned or dried as an insect repellent.
What the research says
An honest read of the published research — what has actually been studied, at what stage. Not medical advice or a promise of results.
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Canadian fleabane oil has been characterised chemically and studied for antimicrobial activity in the laboratory. Its traditional uses are preliminary and not clinically established.
JEOR study (2000)
Evidence & sources
Peer-reviewed research on Canadian Fleabane's chemistry and safety. These describe composition and documented effects — not health or treatment claims.
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Canadian fleabane (Conyza/Erigeron canadensis) is a limonene-dominant oil, with a small matricaria-ester fraction contributing to its fresh, green character.
JEOR study (2000)
Frequently asked questions
What is Canadian fleabane?
It's the oil of Conyza canadensis (also called Erigeron canadensis), a common North American plant. The distilled oil is limonene-rich with a fresh, green, slightly grassy aroma, used mainly in blends. JEOR study (2000)
Does Canadian fleabane oil oxidise?
Yes — because it's high in limonene, it oxidises over time like citrus oils, and oxidised oil is more likely to irritate. Store it cool, sealed, and out of light. JEOR study (2000)
Is Canadian fleabane phototoxic?
No — despite being limonene-rich, it isn't a cold-pressed citrus oil and isn't considered phototoxic. Dilute it for skin use as usual.
Gallery
The Plant
Canadian Fleabane (Erigeron canadensis, also classified as Conyza canadensis) is a common, unassuming weedy herb found across roadsides, fields, and disturbed ground throughout North America — the kind of plant most gardeners pull without a second thought. It has a modest history in North American folk herbalism, where it was sometimes burned or dried as an insect repellent, which is where the “fleabane” name comes from.
Extraction & Aroma
The oil is steam-distilled from the flowering plant, producing a fresh, green, slightly citrusy aroma from its natural limonene content. It’s a lighter, more understated single oil compared to the heavier resins and woods that dominate most single-oil collections.
Traditional & Everyday Uses
In the diffuser: 3–5 drops alone, or blended with a citrus oil like lemon or orange for a bright, energizing atmosphere suited to morning routines.
On skin: dilute in a carrier oil before topical use, as with most single oils in this aromatic family, and patch-test first since it’s a less commonly used oil with less established topical-use history than more mainstream options.
Pairing
Because its own aroma is fairly light and green, Canadian Fleabane works well as a supporting note rather than a centerpiece — a small amount blended into a citrus or herbaceous mix adds freshness without overpowering the rest of the blend.
Sourcing Note
Canadian Fleabane is a lesser-known oil outside specialty collections, so batch-to-batch consistency depends heavily on the distiller’s sourcing and care, and it’s worth buying from a supplier that documents where and how the plant was harvested.