13- Caltha plants :

1- Caltha palustris (Kingcup)

Family: Ranunculaceae

Genus: Caltha

Species: palustris

Common Name: Kingcup or Marsh Marigold

Position: Full sun, light shade

Hardiness: Hardy

Soil type: Moist, boggy, lime free

Planting depth: Up to 5cm

Height: 40cm

Spread: 45cm

Flowering period: March to July

Propagation: Divide or sow seeds in late summer

Skill: Easy

Notes: Caltha has waxy dark green, kidney-shaped leaves and buttercup-like yellow flowers.

Native to the UK.

Caltha prefers acid or neutral soils. It grows best in full sun or light shade.

The slightly smaller variety Caltha palustris 'Plena' has double flowers that resemble small pompom Chrysanthemums.

- Caltha “Honeydew”

A hybrid plant, slightly more upright with bigger leaves and flowers, which can root at the nodes to form new plants.

• Height 40cm
• Full sun or part shade
• Plant 0-5cm deep

2- Caltha Leptosepala
A rarely offered American species with white flowers made up of sepals rather than petals, flowering in Spring but occasionally thereafter.

• Depth 0cm
• Height 20cm
• Spread 30cm

Caltha leptosepala, the white marsh marigold, twinflowered marsh marigold, or broadleaved marsh marigold, is a species of flowering plant in the buttercup family. It is native to western North America from Alaska to New Mexico, where it grows in wet mountain habitats in alpine and subalpine regions. There are two general wild types of this species, one native to the interior and one that grows along the Pacific coast and coastal mountains, but these are not always treated separately.

Plant Characteristics

Duration: Perennial Habit: Herb Leaf: Green Fruit: Size Class: 0-1 ft.

Bloom Information

Bloom Color: White Bloom Time: May , Jun , Jul , Aug

Distribution

USA: AK , AZ , CA , CO , ID , MT , NM , NV , OR , UT , WA , WY Canada: AB Native Distribution: AK, s. in mts. to NM, AZ & e. OR Native Habitat: Wet alpine & subalpine meadows; stream edges; bogs

Growing Conditions

Water Use: High Light Requirement: Part Shade Soil Moisture: Wet CaCO3 Tolerance: Medium Soil Description: Moist to wet soils. Conditions Comments: Not Available

Benefit

Conspicuous Flowers: yes

Propagation

Description: Propagate by seed or division of roots.
Seed Collection: Not Available
Seed Treatment: Not Available
Commercially Avail: yes

- Caltha palustris alba (White Marsh Marigold)
smaller species to 30cm; often the first to flower in Spring.

• Height 30cm
• Full sun or part shade
• Plant 0-5cm deep

Buy in a 1 litre basket (11cm/4" high)

Caltha palustris var. alba has small round leaves with 1" single white flowers with yellow centres

Height 20cm (8") Flowers February - April

Plant in wet mud in a stream edge/bog garden or with up to 2cm (1" approx) of water over the top of the basket in a partially shaded pond or container pond. Suitable for shelf 0

Cut back leaf growth after Caltha palustris var. alba has flowered and allow fresh foliage to regrow - old growth may turn grey. A second flush of white Marsh Marigold flowers may appear later in the season.

- Caltha palustris plena (Double Marsh Marigold)
makes a slowly spreading clump, double pompom yellow flowers in Spring. Increase by division only.

• Height 30cm
• Full sun or part shade
• Plant 0-5cm deep

Caltha palustris ‘Plena’

Marsh Marigold

USDA Zone: 2-9

Plant number: 1.109.250

A native wildflower over most of the Northern hemisphere, and much loved for their showy yellow buttercups that grace streamsides and other wet places in early spring. This grows best in a rich moist soil, that never dries out, but will adapt to all but dry conditions. This is a unusual selection, selected for the beautiful, fully double button flowers that appear in April and May. Lovely reflecting in a pond.

Further details for
Caltha palustris ‘Plena’

Optimal Growing Conditions

Sun Exposure :Full Sun or Partial Shade

Soil Type :Clay

Soil pH :Neutral orAlkaline orAcid

Soil Moisture :Average orMoist orWet

Care Level :Easy

Appearance and Characteristics:

Flower Colour :Yellow

Blooming Time :Early Spring , Mid Spring ,Late Spring

Foliage Color ,Deep Green

Plant Uses & Characteristics
Accent: Good Texture/Form
Waterside :Wild Flower

Flower Head Size :Large

Height :15-30 cm - 6-12 inches

Spread :30-45 cm - 12-18 inches

Foot Traffic :None
Growth Rate :Medium

- Caltha palustris palustris (Giant Marsh Marigold)
previously C polypetala. Bigger, taller version to 1 metre high. Makes an impressive clump which will spread out into deeper water to break up the pond outline. Makes new plants at the nodes on the flower stems.

• Height 60-90cm
• Full sun or part shade
• Plant 0-15cm deep

Our Marsh Marigold plug plants for sale are priced per individual plant. This product has a minimum quantity of 10 plug plants. For orders over 500 plug plants please contact us.

All our plants are native British wildflowers grown from wild seed in our sustainable nursery.

Common Name: Marsh Marigold

Latin Name: Caltha palustris

Description: Also known as Kingcup, the Marsh marigold favours damp habitats, and as found in marshes, fens, ditches and wet woodland. It is a relatively early bloomer, attracting many insects with its large yellow flowers. Marsh marigolds are found throughout the UK and Ireland, although they are presently less common in the lowlands due to the draining and resowing of damp meadows.

Flower Colour: Yellow

Flowering Times: March to July

Plant Height: 30-40cm

Management: The Marsh Marigold plant does well in both partial shade and open areas. It thrives near water, pond sides, water meadows, and wet woodland.

Buy in a 1 litre basket (11cm/4" high)

British Native Marsh Marigold (Caltha palustris) (AGM)

Mounds of round leaves with 3cm (1" approx) single yellow flowers

Height 30cm (12") Flowers March - May

Plant in wet mud in a stream edge/bog garden or with up to 10cm (4") of water over the top of the basket in a sunny or partially shaded pond. For shelf 0 or shelf 1

Cut back leaf growth after Caltha palustris has flowered and allow fresh foliage to regrow - old leaf growth can go grey. British Native Caltha palustris is good for colonizing areas to encourage wildlife as it gives plenty of habitat opportunities and is loved by hoverflies, bees and butterflies. It will spread by seedlings if allowed to.

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