Crassula recurva

RHS Plant Profile
New Zealand pigmyweed

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New Zealand pigmyweed RHS

Other common names

Australian swamp stonecrop, New Zealand pygmy weed

Synonyms

Crassula recurva

Aquatic

This plant is listed as an invasive non-native species in the UK – see Cultivation section for details A perennial plant with yellowish-green, small succulent leaves and small whitish flowers. It grows submerged in water or rooted in wet ground beside water, forming dense mats of creeping growth

Position

Full sun

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
Poorly–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–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)
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Crassulaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Matforming
Genus
Crassula can be succulent annuals, perennials, evergreen shrubs or sub-shrubs, with fleshy leaves and small, star-shaped or funnel-shaped flowers in a terminal cluster
Name Status
Synonym

How to Grow

Cultivation

This plant is listed on Schedule 9 of the Wildlife & Countryside Act (1981), the Wildlife (Northern Ireland) Order 1985, and the?EU list of Invasive Alien Species of Union Concern as an invasive non-native species. ?It?should?not be planted or caused to grow in the wild?in?the?UK.?It is also banned from sale, and gardeners who already have it should take steps to control it.?See RHS advice on?invasive non-native species?for further information

Propagation

Spreads through broken stem fragments; seeds are produced but are not thought to be viable. See cultivation notes

Pests

See cultivation notes

Diseases

See cultivation notes