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Plumbago auriculata

Plumbago auriculata
Cape Leadwort, Blue Plumbago, Cape Plumbago

4,8/5
41 reviews
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Very beautiful plant that quickly thrived by the seaside in Gironde, with splendid little azure blue flowers appearing in the heart of summer. In impeccable condition upon delivery.

Jerwan, 30/12/2023

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This plant carries a 6 months recovery warranty

More information

Value-for-money
This semi-evergreen South African shrub is appreciated in mild climates for its long, abundant summer and autumn flowering in panicles of small, clear, pure sky-blue flowers. This shrub is long-lived in mild climates but will be completely cut back by frost, starting again from the base in spring after brief frosts of around -7/-8°C. It should be grown in full sun, in deep, fertile, cool to occasionally dry soil, without excess limestone, which turns the foliage yellow.  
Flower size
3 cm
Height at maturity
1.50 m
Spread at maturity
1 m
Exposure
Sun
Hardiness
Hardy down to -6°C
Soil moisture
Dry soil, Moist soil
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Best planting time March to April
Recommended planting time March to June
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Flowering time July to October
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Description

The Plumbago auriculata, or Cape Leadwort, is an exuberant semi-climbing bush, highly regarded by gardeners in mild regions, where frost does not strike too hard or last too long. This plant is originally from South Africa and loves sunny and warm environments. It produces beautiful and long-lasting blue flowering, rare among bushes that flower in summer and autumn. The blue shade wonderfully complements all the other colours in the garden until late in the season. However, it is not very hardy in colder areas. Therefore, it is advisable to grow it in a pot and bring it inside a greenhouse as soon as the temperature drops.

The Plumbago auriculata, commonly known as the Cape Leadwort, is a plant that belongs to the Plumbaginaceae family. It is part bush and part climber, with flexible branches that can grow up to 2.5 to 3 metres tall and spread 2.5 metres wide unless pruned back due to cold weather. When grown in a pot, its size is smaller, around 1.5 metres tall and 1 metre wide. The plant has dense, rounded, and unruly habits if not trained against a wall. 

The most striking feature of the Cape Leadwort is its beautiful flowering, which starts in July and lasts until the first frost. During this time, the bush is covered with numerous panicles of clear light blue flowers growing at the branches' ends. Each bouquet comprises dozens of tiny flowers, similar to phlox, and measures 10 to 15 cm long. The leaves of the Cape Leadwort are light green and vivid, measuring about 5 cm in length and 2 cm in width. They are evergreen in mild climates and oblong in shape. The Cape Leadwort is easy to grow and care for and a beautiful addition to any garden or landscape.

The Plumbago auriculata is an easy-to-grow plant that can adapt to different needs. It can be grown in open ground or pots, provided it is planted properly and given enough food, water, and sunlight. It is a versatile plant that can be used in many ways. It can be used for mass plantings, as a standalone specimen, or as a large ground cover. It can also be trained on a support like a trellis or fence. Some gardeners even plant it at the top of a retaining wall to enjoy its beautiful sky-blue flowers. The plant's neutral and pastel-coloured flowers easily blend with other flowering bushes in mild climates. For example, it can be combined with other colourful flowers like Sesbania punicea, Melaleuca gibbosa, Gomphostigma virgatum, ivy geraniums, dwarf pomegranate, or oleander. In the summertime, Indian lilacs can be added to create a beautiful ensemble of vibrant colours softened by the plant's celestial flowers.

Plumbago auriculata in pictures

Plumbago auriculata  (Flowering) Flowering
Plumbago auriculata  (Foliage) Foliage

Plant habit

Height at maturity 1.50 m
Spread at maturity 1 m
Growth rate normal

Flowering

Flower colour blue
Flowering time July to October
Inflorescence Panicle
Flower size 3 cm

Foliage

Foliage persistence Evergreen
Foliage colour green

Botanical data

Genus

Plumbago

Species

auriculata

Family

Plumbaginaceae

Other common names

Cape Leadwort, Blue Plumbago, Cape Plumbago

Origin

South Africa

Planting and care

Growing Cape Leadwort in cooler climates can be risky, but planting it in a sheltered spot where winter temperatures do not frequently drop below -8°C (17.6°F) can help it thrive. A well-established plant can regrow quickly from the stump in spring, and with warmth and light, it can start flowering as early as June-July. It needs loose, deep, fertile soil that is regularly amended. While it is drought-resistant, watering it regularly can improve the look of the bush and increase its flowers. Be careful of excess limestone in the soil and watering water, as it can cause yellowing of foliage. Treat this with sequestrene preventively in spring and during summer. If winter cuts back all the vegetation, prune the branches in March.

You can grow Plumbagos in pots in a warm, bright place, like a greenhouse, providing them with a rich substrate. Take them out when the outside temperature is warm enough and bring them in at the start of autumn when temperatures begin to drop. During the growth period, water two to three times a week and apply liquid fertiliser every 15 days for optimal flowering. Reduce watering in winter. Watch out for pests like scale insects, whiteflies, and red spiders, especially when growing in a greenhouse. They usually prefer warm, dry, and confined atmospheres.

You can propagate Cape Leadwort by taking cuttings of herbaceous stems during flowering or semi-woody branches in autumn.

 

Planting period

Best planting time March to April
Recommended planting time March to June
Type of support Arch, Tree, Trellis

Intended location

Suitable for Meadow, Rockery
Type of use Border, Free-standing, Container, Climbing
Hardiness Hardy down to -6°C (USDA zone 9a) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun
Soil pH Neutral
Soil moisture Dry soil, Moist soil, drained

Care

Pruning instructions If the cold has destroyed the aerial parts in the open ground, prune all the branches 15 cm above the ground in March.
Pruning Pruning recommended once a year
Pruning time March
Soil moisture Dry soil, Moist soil
Disease resistance Very good
Overwinter Needs to be stored
4,8/5
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