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Herbaceous Perennial

Ranunculus constantinopolitanus 'Plenus' (d)

A clump-forming perennial to a height of 30cm, with deeply lobed dark green leaves and bright yellow double flowers with green centres from mid spring to midsummer

Synonyms

Ranunculus bulbosus 'Speciosus Plenus'
Ranunculus speciosus 'Flore Pleno'

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Ultimate height

0.1–0.5 metres

Time to ultimate height

1–2 years

Ultimate spread

0.1–0.5 metres

Clay

Loam

Moisture

Moist but well–drained, Poorly–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

Aspect

South–facing or West–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)

Botanical details

Family: Ranunculaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Clump forming
Potentially harmful: Harmful if eaten, skin irritant. Wear gloves and other protective equipment when handling. Pets: Harmful if eaten, skin irritant - for further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus: Ranunculus can be annuals, biennials, evergreen or herbaceous perennials, with rhizomes, tubers or spreading by runners. The leaves are variable but often palmately lobed or dissected and the flowers usually bowl-shaped
Name status: Accepted

How to grow

Cultivation

Grow in damp, but well-drained soil in sun or part shade

Propagation

Propagate by division in autumn or spring

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Rock garden
Low Maintenance
Flower borders and beds
Ground cover

Pruning

Cut back in autumn as foliage dies back

Pests

May be susceptible to aphids, slugs and snails

Diseases

May be susceptible to powdery mildews, a rust and grey moulds

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