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Helianthemum Orange Double - Rock Rose

Helianthemum apenninum x mummularium Orange Double
Rock Rose

4,4/5
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Thank you to the individuals (C.D. for order preparation & quality control and Nöella from the shipping department), the 3 Hélianthemum received appear to be healthy. Planted in a rockery near several orange roses, I am now awaiting establishment...

Thierry, 17/02/2021

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This plant carries a 12 months recovery warranty

More information

Value-for-money
A new elegant, floriferous variety with unusual soft and warm colouring. Orange flowers bloom tirelessly from May-June to September on a well-spreading subshrub with semi-evergreen grey-green foliage. Ideal in a rockery, on a dry slope, or in a planter. To be cultivated in very well-drained, even poor, soil, in full sun.
Flower size
3 cm
Height at maturity
15 cm
Spread at maturity
35 cm
Exposure
Sun
Hardiness
Hardy down to -18°C
Soil moisture
Dry soil, Moist soil
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Best planting time March, September
Recommended planting time March to June
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Flowering time May to August
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Description

Helianthemum 'Orange Double' enriches the range of Helianthemums with its beautiful and long double flowering in a soft and warm color. Its small flowers bloom from May to September, on delicate foliage of a beautiful ash green that is evergreen if the winter is not too cold. This subshrub, hardy in well-drained soil, forms lovely ground cover for sunny areas of the garden such as a rockery or the top of a wall. It is a good plant for a dry or mineral garden, and will also look wonderful in a container on the terrace.

Belonging to the family of Cistaceae, the 'Orange Double' Helianthemum is a recent horticultural hybrid resulting from the cross-breeding of H. apenninum, native to southern Europe, and H. mummularium, widespread in Europe and Turkey. Like other varieties of the genus, 'Orange Double' loves limestone, rocky, sandy soils and the sun. It forms a very low-growing, spreading and dense subshrub, reaching a cushion height of 15 cm (6 in) and a width of 30 to 40 cm (12 to 16 in). Its more or less evergreen foliage is composed of tiny linear leaves, of a fairly light grey-green, slightly shiny, which highlights its abundant and bright blooms in light orange with a small yellow centre. From May-June to August-September, it is covered with a multitude of small flowers with a diameter of 2.5 cm (1 in), in double cups, slightly crumpled, adorned with a bouquet of golden to orange stamens. Helianthemum means "flower of the sun" in Greek, an appropriate name for these flowers that only open in the sun. Its delicate little blooms do not last long, but are constantly renewed.

Helianthemum is the ideal plant to enhance a rocky garden, a sunny slope, cascading on a wall, or in paving. It also thrives well in pots or containers for terraces. It can also be considered for the creation of green walls and green roofs. Combine it with other rock plants (Erigeron, Creeping Gypsophila, Mont Olympe St. John's Wort), but also with perennials such as lavender, dryland iris, sedums, or perennial geranium macrorrhizum. Its flowers blend delicately with the grey foliage of stachys, dwarf artemisia or silver basket.

Helianthemum Orange Double - Rock Rose in pictures

Helianthemum Orange Double - Rock Rose (Flowering) Flowering
Helianthemum Orange Double - Rock Rose (Foliage) Foliage

Flowering

Flower colour orange
Flowering time May to August
Inflorescence Cyme
Flower size 3 cm
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Semi-evergreen
Foliage colour green

Plant habit

Height at maturity 15 cm
Spread at maturity 35 cm
Growth rate normal

Botanical data

Genus

Helianthemum

Species

apenninum x mummularium

Cultivar

Orange Double

Family

Cistaceae

Other common names

Rock Rose

Origin

Cultivar or hybrid

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Planting and care

Easy to grow and low maintenance, 'Orange Double' Helianthemum enjoys being planted in full sun, in a neutral or limestone soil that is perfectly drained, even occasionally dry and rich in gravel or sand. Not tolerating stagnant moisture in winter, it will be necessary - especially in cold and wet climates - to lighten the soil during planting by adding gravel, compost, and coarse sand to improve drainage. Helianthemum is a hardy plant that can withstand temperatures ranging from -10 to -20°C (14 to -4 °F) depending on the variety. It tolerates drought quite well and only requires regular watering (without excess) during the first year after planting; afterwards, the plant can manage on its own. At the end of flowering, pinch off the faded flower stalks and foliage to encourage an autumnal rebloom. Lightly trimming the clump with hedge shears can be done after flowering to maintain dense vegetation and prevent the centre from becoming bare. When young, make sure to protect it from any weeds that will deprive it of moisture or block the sunlight essential for its health.

 

Planting period

Best planting time March, September
Recommended planting time March to June

Intended location

Suitable for Meadow, Rockery
Type of use Border, Edge of border, Container, Slope
Hardiness Hardy down to -18°C (USDA zone 7a) Show map
Ease of cultivation Amateur
Planting density 7 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Chalky (poor, alkaline and well-drained), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, Very well-drained, light, stony or sandy.

Care

Pruning instructions To maintain a compact habit, prune after flowering.
Pruning Pruning recommended once a year
Pruning time September to October
Disease resistance Very good
Overwinter Can be left in the ground
4,4/5
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