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Ceratostigma willmottianum Sapphire Ring

Ceratostigma willmottianum Sapphire Ring
Chinese plumbago, Hardy plumbago, Blue plumbago, Leadwort, Willmott's plumbago

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This plant carries a 24 months recovery warranty

More information

Heat and contrast between the golden foliage and cobalt blue flowers! Extraordinary bush for full sun in the garden or in pots.
Height at maturity
80 cm
Spread at maturity
1 m
Exposure
Sun
Hardiness
Hardy down to -15°C
Soil moisture
Dry soil, Moist soil
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Best planting time April to May
Recommended planting time March to May, September
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Flowering time July to November
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Description

The Ceratostigma willmottianum 'Sapphire Ring' is a small compact shrub with a long-lasting cobalt blue flowering, forming a superb contrast with the golden yellow foliage. Suitable for borders and containers in warm and sheltered locations.

Also known as "Leadwort" or "Willmott's Plumbago", the Ceratostigma willmottiae 'Sapphire Ring' is a small shrub with a flexible habit, compact and well-branched, reaching a height of about 60 to 80 cm (23.6 to 31.5 in) and a bit more in width. The 'Sapphire Ring' variety has bright golden-yellow leaves that are oval-shaped and covered with hair on both sides. This helps the shrub to survive in hot temperatures. From July to the first frost, it produces numerous delicate, light blue flowers with five petals each. During autumn, the leaves turn reddish-purple, which creates more contrast.

 

It requires full sun exposure and a perfectly drained soil. It is hardy down to -8 to -10°C (17.6 to 14 °F), so it needs winter protection in colder areas. It can be easily grown in containers, which allows it to be sheltered in a cold greenhouse for the winter. It looks stunning on a south-facing terrace with annuals, also consider it to bring a "youthful touch" to a sunny rockery!

 

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Plant habit

Height at maturity 80 cm
Spread at maturity 1 m
Habit Irregular, bushy
Growth rate normal

Flowering

Flower colour blue
Flowering time July to November

Foliage

Foliage persistence Deciduous
Foliage colour golden

Botanical data

Genus

Ceratostigma

Species

willmottianum

Cultivar

Sapphire Ring

Family

Plumbaginaceae

Other common names

Chinese plumbago, Hardy plumbago, Blue plumbago, Leadwort, Willmott's plumbago

Origin

Cultivar or hybrid

Product reference804321

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Planting and care

Ceratostigma should be planted in well-drained soil in a sunny location in a sheltered position. This plant is easy to grow. It can also be used in a pot, with good compost for flowering plants with slow-release fertiliser.

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Planting period

Best planting time April to May
Recommended planting time March to May, September

Intended location

Suitable for Meadow, Rockery
Type of use Border, Container
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Ease of cultivation Beginner
Planting density 1 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Chalky (poor, alkaline and well-drained), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, no excessive moisture

Care

Pruning instructions To prevent your tree from drooping as it ages, trim about one third of its branches during the spring when vegetation starts again. This will keep it looking healthy and strong.
Pruning Pruning recommended once a year
Pruning time April to May
Soil moisture Dry soil, Moist soil
Disease resistance Very good
Overwinter Needs protection

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