Sisyrinchium californicum Brachypus Group

RHS Plant Profile
golden-eyed grass Brachypus Group

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Synonyms

Sisyrinchium brachypus

Bogs Grass Like
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A dwarf, semi-evergreen perennial to 15cm tall, with sword-shaped, grey-green leaves. In summer, short stems bear a succession of star-shaped, bright yellow flowers. Tolerant of a range of conditions but does best in boggy ground

Position

Full sun

Soil Types

Clay, Loam, Chalk, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Clay Loam Chalk Sand
Moisture
Poorly–drained or Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Iridaceae
Native to GB/Ireland
No
Foliage
Semi evergreen
Habit
Clump forming
Genus
Sisyrinchium can be annuals or rhizomatous perennials forming a clump of narrowly sword-shaped leaves with erect stems carrying solitary or clustered, star-shaped or bell-shaped flowers in spring or summer
Name Status
Unresolved
Plant Range
N America

How to Grow

Cultivation

Grow in moderately fertile, moist to poorly drained soil in full sun. May have the potential to become a nuisance as seeds prolifically

Propagation

Propagate by division or seed

Suggested planting locations and garden types

  • Coastal
  • Patio and container plants

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free