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Plant guide

Soft brome.

Bromus hordeaceus

Pronounced BROH-mus hor-dee-AY-see-us

Also known as Barley Brome, Barley Brome, Soft Brome, Lesser Soft-Brome, Lop Grass, Soft Brome, Soft Chess, Soft-Brome

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Soft brome is a common annual grass often found in fields and along roadsides. It is known for its soft, hairy texture and nodding flower heads. You will see it pop up in disturbed areas during the spring and summer months.

At a glance

Care level
Easy
Plant type
Grass
Light
Full sun
Indoor light
Direct sun
Water
Every 3 to 7 days
Mature size
30 to 80 cm
Growth rate
Fast
Hardiness
USDA 4 to 9
Bloom time
Late spring to early summer

Care

This grass thrives in full sun and well drained soil. Keep an eye out for excessive dryness if you are growing it in a container. It is quite hardy and usually takes care of itself in natural settings.

Watering
Water when the top inch of soil feels dry to the touch.
Feeding
Apply a balanced fertilizer sparingly during the active growing season.
Pruning
Trim back dead foliage after the plant finishes flowering to keep it tidy.
Repotting
Repot only if the roots become severely pot bound.
Soil
Well drained sandy or loamy soil
Soil pH
6.0 to 7.5
Temperature
-15 to 35°C
Humidity
30 to 70%

Safety

People
This plant is not known to be toxic to humans.
Children
The sharp, dry seed heads can be irritating or cause minor scratches if handled by small children.
Contact allergens
The rough hairs on the leaves and stems can cause mild skin irritation in sensitive individuals.
Airborne allergens
The windborne pollen can trigger seasonal allergies in susceptible people.
Edibility
The seeds are technically edible but are not considered a food crop and may be difficult to process.

How to identify it

  • Softly hairy leaf blades
  • Nodding panicle flower clusters
  • Spikelets with distinct awns
  • Annual growth habit
  • Tufted base structure
Height
0.1 to 0.8m
Spread
0.1 to 0.3m
Leaves
green, gray-green, deciduous
Flowers
green, tan, 1 to 10cm

Problems to watch for

  • Rust · Fungal infection causing orange or brown pustules on the leaves.

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Growing it

Propagation
seed
When to plant
spring, fall

Plant it in meadows where you want to encourage natural succession rather than formal garden beds.

Grows well with

  • Common Yarrow · They share similar light and moisture requirements in meadow settings.

Similar species

  • Cheatgrass · It is a closely related invasive grass that also thrives in disturbed areas.

Science

Family
Poaceae
Genus
Bromus
Order
Poales
Class
Liliopsida
Native range
Europe, Western Asia, and North Africa.
Conservation
It is considered an invasive weed in many parts of North America and Australia.

It thrives in disturbed habitats and open grasslands by producing large quantities of seeds that germinate easily.

Value to wildlife
larval host plant, seed source for birds
Pollinators
bees
Uses
erosion control, wildlife habitat, forage

Through the year

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Flowering
Fruiting
Foliage

Ecological indicators

Salinity
2/9
Soil reaction
6/9
Light
7/9
Temperature
5/9
Moisture
4/9
Nutrients
3/9

Taxonomy resolved against GBIF.

Questions people ask

Is this grass good for lawns?
Generally no, as it is an annual that dies back and leaves unsightly patches.
How do I get rid of it?
Mow it before it goes to seed to prevent it from spreading.

Where the name comes from

The genus name Bromus comes from the Greek word bromos, meaning a type of oat, while the species name hordeaceus refers to its resemblance to barley.

Good to know

  • It is often called soft brome because of the fine hairs on its foliage.
  • It is an annual grass that completes its entire life cycle in one season.
  • It is highly adaptable to various soil types including poor, sandy, or clay soils.

Keep your soft brome 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.