Cycas revoluta

RHS Plant Profile
Japanese sago palm

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Japanese sago palm RHS 2002
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Other common names

cycad

Synonyms

Cycas sexseminifera
Cycas miquelii

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A slow-growing, palm-like evergreen perennial to 2m, with arching pinnate leaves to 1.5m in length, and golden-brown, ovoid inflorescences which are rarely seen except on mature plants

Position

Partial shade

Soil Types

Loam

Max Height

1-1.5 metres

Max Spread

1-1.5 metres

Size

Time to Maturity
20–50 years
Max Spread
1-1.5 metres
Max Height
1-1.5 metres

Growing Conditions

Loam
Moisture
Moist but well–drained
pH
Acid or Neutral

Position

Partial shade
Aspect
South–facing or East–facing
Exposure
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)
H3

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Cycadaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Tufted
Potentially harmful
Harmful if eatenskin irritant. Wear gloves and other protective equipment when handling TOXIC to pets (dogs, cats) - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus
Cycas are evergreen dioecious perennials with stout woody trunks bearing large, leathery, pinnate leaves in a terminal rosette; male inflorescences are large and cone-like, female ones consist of smaller, modified leaves
Name Status
Correct
Plant Range
Far East

How to Grow

Cultivation

Grow under glass in a peat-free, loam-based potting compost with additional leaf mould and grit; provide full light with shade from hot sun and moderate humidity. Water moderately in the growing season, sparingly at other times. Alternatively in frost free areas, grow in a moist but well-drained soil in bright light with some protection from full sun

Propagation

Propagate by seed or suckers

Suggested planting locations and garden types

  • Architectural
  • Patio and container plants

Pruning

No pruning required

Pests

Generally pest-free outdoors, but may be susceptible to glasshouse red spider mite under glass

Diseases

Generally disease-free