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Westringia fruticosa Mundi

Westringia fruticosa Mundi
Coastal Rosemary, Australian Rosemary, Victorian Rosemary

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This Westringia owes its name of Australian Rosemary to its resemblance to common rosemary. This shrub also has evergreen needle-like leaves of a grey-green colour and produces small labiate flowers. In this Mundi variety, they are white and appear from April to September on the branches. This flowering is not very abundant, but it has the merit of being very long-lasting! This 'Mundi' variety forms a very dense and good ground cover in mild Mediterranean climates.
Flower size
1 cm
Height at maturity
50 cm
Spread at maturity
1.50 m
Exposure
Sun
Hardiness
Hardy down to -4°C
Soil moisture
Dry soil, Moist soil
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Best planting time March to April
Recommended planting time March to May
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Flowering time April to September
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Description

Westringia fruticosa Mundi comes from a shrub formerly named Westringia rosmariniformis, commonly known as Australian rosemary due to its resemblance to the emblematic shrub native to the Mediterranean scrublands. This discreetly elegant shrub belongs to the same Lamiaceae family, also has evergreen leaves in a needle-like shape, with a green-grey colour and a white underside, and produces small bilabiate flowers. But those of this 'Mundi' variety are white and they bloom from April to September. This soft shrub forms a well-spread and dense ground cover, to be reserved for coastal areas. But as it adapts very well to pot cultivation in cold regions, it will bring a touch of Mediterranean flair to the terrace throughout the summer season before being stored frost-free in winter.

Westringia fruticosa is native to eastern Australia and southern New South Wales. It is a plant that prefers well-drained and dry, rather acidic soil. This shrub has a rounded and slightly spreading habit, supported by stiff square-sectioned branches. Its growth is quite fast in moist soil. An adult specimen will reach an average of 1.2 m (4 ft) in all directions, but depending on the richness and freshness of the soil, it can reach 2 m (6 ft 6 in) or even more in a favourable climate.

The 'Mundi' variety differs from the type species by its very spreading habit, forming a perfect ground cover. This small shrub will not exceed 40 to 50 cm (16 to 20 in) in height with a spread of 1.5 m (4 ft 11 in). Its evergreen foliage in winter is composed of very narrow, linear leaves, measuring 1.5 to 2.5 cm (0.6 to 1 in) in length. They are a bit stiff, but less leathery than rosemary leaves and arranged in whorls of 3 to 5. Their colour is a dark green with a slightly greyish hue on the top and white-felted on the underside. Flowering occurs from April to September: the white bilabiate flowers are solitary and appear at the axils of the leaves, at the terminal part of the branches. The diameter of the flower varies from 8 mm (0.3 in) to 15 mm (0.6 in) and the flowering stands out more for its duration than for its abundance. 'Mundi' appreciates full sun and, like other Westringias, it is not very hardy: down to -5 °C (23 °F) approximately, provided that the soil is well drained.

Australian Rosemary is elegant, tolerant of soil conditions, and resistant to drought. It can be associated with all kinds of shrubs from mild climates. It will thus make a perfect border for a plant bed, planted with "Mimosas" (Acacia) like the very pretty Acacia pravissima with its lemon-yellow flowers that precede those of 'Mundi'. Callistemons will also be part of the party, of course, with their stunning brush-like flowering in vibrant colours, as well as the beautiful Erythrina crista-gallii Compacta with its coral-red flowers.

Westringia fruticosa Mundi in pictures

Westringia fruticosa Mundi (Flowering) Flowering
Westringia fruticosa Mundi (Foliage) Foliage
Westringia fruticosa Mundi (Plant habit) Plant habit

Plant habit

Height at maturity 50 cm
Spread at maturity 1.50 m
Habit Irregular, bushy
Growth rate normal

Flowering

Flower colour white
Flowering time April to September
Inflorescence Solitary
Flower size 1 cm

Foliage

Foliage persistence Evergreen
Foliage colour green

Botanical data

Genus

Westringia

Species

fruticosa

Cultivar

Mundi

Family

Lamiaceae

Other common names

Coastal Rosemary, Australian Rosemary, Victorian Rosemary

Origin

Cultivar or hybrid

Product reference1009011

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Planting and care

Westringia fruticosa 'Mundi' is preferably planted in spring after the last frost, in a very sunny location. It prefers a soil with an acidic to neutral pH that is sandy, gravelly, poor, and very well drained, but ultimately proves to be not very demanding in terms of soil, even tolerating the presence of limestone quite well. In regions where the soil and subsoil are limestone, it is advisable to dig a large hole measuring 60 cm (24 in) in all directions, which will be filled with heath soil or peaty compost and non-limestone sand. Growing it in a pot allows for better control of the substrate and for storing the plant frost-free in areas with borderline hardiness (down to -5/-6 °C (23/21.2 °F) for a well-established plant). Potting soil for Mediterranean plants is also well suited for container or ground cultivation.

Westringias are drought-tolerant plants once well established: monitor watering during the first 2 summers; this will become optional, or even unnecessary, later on. Like lavenders and rosemarys, these shrubs sometimes appreciate being forgotten rather than pampered. Regular, but spaced-out watering in summer helps support flowering and maintain a more decorative appearance for this shrub. In the ground, they appreciate the presence of a thick mulch layer and the addition of fertiliser for flowering shrubs if the soil is very poor.

It tolerates pruning well, even quite severe pruning, although this is absolutely not necessary for this ground cover cultivar. To maintain a dense habit, perform annual pruning in March or at the end of flowering.

Planting period

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

Intended location

Suitable for Meadow, Rockery
Type of use Edge of border, Container, Slope
Hardiness Hardy down to -4°C (USDA zone 9b) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun
Soil pH Any
Soil type Chalky (poor, alkaline and well-drained), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, drained

Care

Pruning No pruning necessary
Soil moisture Dry soil, Moist soil
Disease resistance Good
Overwinter Needs protection

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