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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.

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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. 1. Collect seeds from dried flower heads in late summer.
  2. 2. Sow seeds directly onto prepared soil in autumn or early spring.
  3. 3. Lightly cover with soil as they need some light to germinate.
  4. 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

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Flowering
Fruiting
Foliage

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.