Plant guide
Scentless Mayweed.
Tripleurospermum inodorum
Pronounced trip-lew-roh-SPER-mum in-oh-DOR-um
Also known as False Chamomile, False Mayweed, Inland Scentless Mayweed, Scentless Chamomile, Scentless False Mayweed, Scentless Mayweed
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This charming wildflower is a common sight in fields and along roadsides. It produces lovely daisy like flowers that brighten up any sunny spot. It is a hardy plant that handles various soil conditions quite well.
At a glance
- Care level
- Easy
- Plant type
- Annual or short lived perennial
- Light
- Full sun
- Indoor light
- Direct sun
- Water
- Every 5 to 10 days
- Mature size
- 24 to 36 inches
- Growth rate
- Fast
- Hardiness
- USDA 3 to 9
- Bloom time
- Late spring to early autumn
Care
Plant this in a spot that gets plenty of sunshine throughout the day. Keep an eye out for aphids or mildew if the air circulation is poor. It is a prolific self seeder so deadhead if you want to limit its spread.
- Watering
- Water when the top inch of soil feels dry to the touch.
- Feeding
- Apply a balanced liquid fertilizer once during the active growing season.
- Pruning
- Deadhead spent blooms regularly to encourage more flowers and prevent unwanted seeding.
- Repotting
- If growing in a container, move to a larger pot once the roots begin to circle the bottom.
- Soil
- Well draining loamy soil
- Soil pH
- 6.0 to 7.5
- Temperature
- -20 to 30°C
- Humidity
- 40 to 70%
- Drought tolerance
- Moderate
- Lifespan
- Annual or short-lived perennial.
- Deer and rabbits
- Moderate
Signs it needs repotting
- Roots growing out of the drainage holes.
- Water draining through the pot too quickly.
Safety
- People
- The plant is generally considered non-toxic but can cause contact dermatitis in sensitive individuals.
- Children
- Keep children from handling the plant as the sap can cause mild skin irritation.
- Contact allergens
- The foliage may cause skin irritation or rashes upon direct contact.
- Airborne allergens
- The pollen can trigger hay fever symptoms in sensitive people during the peak bloom period.
- Edibility
- While often confused with true chamomile, this plant is not typically consumed and may cause digestive upset.
How to identify it
- Daisy like white ray florets
- Yellow central disc florets
- Finely divided feathery leaves
- Smooth hairless stems
- Lack of strong scent
- Height
- 0.2 to 0.6m
- Spread
- 0.15 to 0.4m
- Leaves
- green, deciduous
- Flowers
- white, yellow, 2 to 4cm
Problems to watch for
- Powdery mildew · A white fungal growth appears on leaves during periods of high humidity and poor airflow.
Check your scentless mayweed from a photo
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Growing it
- Propagation
- seed
- When to plant
- spring, autumn
- Overwintering
- In colder climates, the plant typically dies back to the ground. You can leave the dried stems for winter interest or clear them away in early spring.
- In containers
- It grows well in containers but requires a pot at least 20 centimeters deep to accommodate its root system.
Seed
- 1. Collect seeds from dried flower heads in late summer.
- 2. Sow seeds directly onto prepared soil in autumn or early spring.
- 3. Lightly cover with soil as they need some light to germinate.
- 4. Keep the area moist until seedlings establish.
Plant this in sunny, open areas where you want to encourage a naturalistic meadow look.
Grows well with
- Cornflower · They share similar growing requirements and create a classic meadow aesthetic.
- Common Poppy · These plants naturally occur together in disturbed agricultural fields.
Similar species
- German Chamomile · It is often mistaken for this species but has a distinct fruity scent.
- Scented Mayweed · It shares a similar growth habit but has cone-shaped flower heads without white petals.
Science
- Family
- Asteraceae
- Genus
- Tripleurospermum
- Order
- Asterales
- Class
- Magnoliopsida
- Native range
- Europe and temperate Asia.
- Conservation
- It is a common weed and is not of conservation concern.
It thrives in disturbed soils and open areas where it can outcompete other annuals for light.
- Value to wildlife
- nectar source
- Pollinators
- bees, butterflies, beetles
- Uses
- wildflower meadows, pollinator gardens, disturbed site restoration
Through the year
Ecological indicators
- Salinity
- 2/9
- Soil reaction
- 6/9
- Light
- 8/9
- Temperature
- 5/9
- Moisture
- 5/9
- Nutrients
- 6/9
Taxonomy resolved against GBIF.
Questions people ask
- Is this plant the same as chamomile?
- No, it is often confused with chamomile but lacks the characteristic scent and medicinal properties.
- How do I control it?
- You can manage it by pulling it before it sets seed or by mowing it regularly.
Where the name comes from
The name Tripleurospermum refers to the three-ribbed seeds, while inodorum means scentless.
Good to know
- It is a prolific self-seeder that can quickly colonize bare soil.
- It is frequently found growing in fields and along roadsides.
- The flowers look very similar to those of Matricaria chamomilla.
Keep your scentless mayweed growing
This page is a general guide. Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked.
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This guide was generated with AI on and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.
