Milium effusum 'Yaffle' (v)

RHS Plant Profile
wood millet 'Yaffle'

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wood millet 'Yaffle' RHS
Grass Like
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A semi-evergreen, perennial grass forming loose clumps of arching, bright green leaves each with a central yellow stripe. Delicate, open sprays of yellow flowers are produced in early summer

Position

Partial shade

Soil Types

Chalk, Clay, Loam, 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

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

Position

Partial shade
Aspect
West–facing or North–facing or East–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)
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Poaceae
Native to GB/Ireland
No
Foliage
Semi evergreen
Habit
Tufted
Genus
Milium can be annual or perennial grasses, forming clumps of flat, broadly linear leaves, with lax flowering panicles in summer
Name Status
Accepted

How to Grow

Cultivation

Grow in any moderately fertile, humus-rich, moist but well-drained soil. Intolerant of full sun on poor dry soil but will tolerate sun if soil is constantly moist

Propagation

Propagate by division in mid-spring

Suggested planting locations and garden types

  • Patio and container plants
  • City and courtyard gardens
  • Cottage and informal garden
  • Low Maintenance
  • Banks and slopes
  • Flower borders and beds

Pruning

Remove dead foliage and old, flowered stems in spring

Pests

Generally pest-free

Diseases

Generally disease-free