Grevillea rosmarinifolia Rosa Jenkinsii

Grevillea rosmarinifolia Rosa Jenkinsii
Rosemary Grevillea, Spider Flower

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2L/3L pot

From 12,90 €

Price per item 13,90 €
Price for 3: 38,70 € i.e 12,90 € each

Sku: 8333411

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Grevillea rosmarinifolia Rosa Jenkinsii 3L/4L pot sample as delivered in autumn

3L/4L pot (Shipped height around 20/30cm)

From 27,50 €

Price per item 32,50 €
Price for 3: 82,50 € i.e 27,50 € each

Sku: 83334

in stock

Available to order Dispatched on

Out of stock • Plan. • Order delay: days

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This plant carries a 24 months recovery warranty

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A compact variety, with very ornamental light green foliage and a beautiful bright pink spring flowering. Resistant to diseases, drought and cold, down to -10°C (14 °F) in perfectly drained soil, it is perfect by the sea, in a flowering hedge or in isolation and grows well in a large pot to be stored away in a cold climate.

Flower size

5 cm

Height at maturity

1.30 m

Spread at maturity

1.30 m

Exposure

Sun

Hardiness

Hardy down to -9.5°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 March to April, September

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Description

Grevillea rosmarinifolia 'Rosa Jenkinsii' is a compact variety of grevillea with rosemary-like leaves, featuring slightly trailing branches covered in very ornamental light green foliage throughout the year. It blooms early in spring, with short clusters of small bright pink spider-like flowers. This evergreen bush is both disease-resistant and tolerant of drought and cold, down to -10°C (14 °F) in well-drained soil. Excellent for coastal hedges, mixed shrub borders and large dry slopes, it also adapts well to container gardening.

Grevillea rosmarinifolia is a bush belonging to the protea family, native to the cooler regions of southeastern Australia. Many Grevillea species are pioneers in their natural environment: they tolerate fairly poor dry soils but do not like limestone, and require full sun to flower. 'Rosa Jenkinsii' is a more modest cultivar, slightly less spiky than its parent, offering mainly springtime pink flowering. It grows rapidly, reaching its mature size in 3 or 4 years, with a rounded habit that averages about 1.3 metres (4 feet 4 inches) in all directions. It develops thin ascending branches, forming a dense and somewhat bushy mass. Its small narrow and pointed leaves do not exceed 1.5 to 3 cm (0.6 to 1.2 in) in length. They are smooth, hairy on the underside, and bright light green. The very decorative flower buds form from late autumn. The flowering "explodes" from March and continues until May, without interruption. It can also reoccur in September in mild climates, if the soil remains somewhat moist in summer. The bright pink petal-less flowers are composed of petal-shaped styles rolled upon themselves and long recurved stamens. They are grouped in short spider-like clusters. The root system of this plant is very dense near the surface, which results in adaptation to nutrient-poor soils and summer drought.

The Grevillea rosmarinifolia 'Rosa Jenkinsii' is fairly resistant to sea spray, requires little maintenance and no watering once established, and tolerates light pruning to maintain density. It will easily thrive in coastal gardens as well as deeper inland, in sheltered positions and preferably in light, well-draining, slightly acidic soil. It will blend well with evergreen ceanothus in dense hedges, flowering over a long period. It will also make a good impression when planted alone on large slopes or in the back of dry gardens, always in an open position, in full sun. In an exotic or Mediterranean garden, it can be combined with proteas, Agave, Caesalpinia gilliesii, Sesbania punicea, Aloe aristata, Leucophyllum frutescens, as well as Callistemon and Leptospermum. Container gardening allows both control of the substrate composition and overwintering the bush in a cold greenhouse or a very bright and minimally heated conservatory in cold regions.

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Family sheet

Modified the 7 August 2025 by Eva 11 min.

Grevillea: planting, pruning and care

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Grevillea are ornamental bushes or small trees, evergreen and native to Australia. They have a flowering that is very exotic, taking the form of clusters or corymbs of flowers made of curled filaments which lasts from late winter to autumn, usually peaking in spring. Flower colour ranges through tones of red, pink, yellow, orange or even white. The best known is <a href="https://en.promessedefleurs.eu/shrubs/shrubs-by-variety/grevillea/grevillea-juniperina.html">Grevillea juniperina</a> or juniper-leaf grevillea, characterised by narrow, needle-shaped leaves and bright red spidery flowers. Les grévilléas présentent une grande diversité en terme de taille et de port, allant de l'arbuste prostré de 15 cm de hauteur (<a href="https://en.promessedefleurs.eu/shrubs/shrubs-by-variety/grevillea/grevillea-lanigera-mount-tamboritha.html">Grevillea lanigera Mount Tamboritha</a>) au petit arbre dépassant 10 m dans son habitat mais souvent limité à 2 m de hauteur en culture. Leur feuillage prend une allure tantôt de frondes de fougères, tantôt d’aiguilles de pins plus ou moins épaisses. Leur longue floraison, abondante et singulière, se compose de petites fleurs sans pétales à pistils saillants, réunies en inflorescences terminales qui prendront selon le cas une disposition en araignée, en ombelle, une forme globuleuse, cylindrique ou de "brosse à dents". <img class="alignnone wp-image-53623 size-full" src="https://www.promessedefleurs.com/blogwp/wp-content/uploads/2018/11/Grevillea2.jpg" alt="Grevillea" width="1172" height="780" /> Grevillea, like many other Australian plants, is not difficult to to grow provided conditions are suitable. These cousins of Protea are semi-hardy plants of poor, free-draining, non-calcareous and fairly dry soils, which thrive in open ground in mild climates and are easy to grow in pots elsewhere. Hardiest among them is probably <a href="https://en.promessedefleurs.eu/shrubs/shrubs-by-variety/grevillea/grevillea-rosmarinifolia.html">Grevillea rosmarinifolia</a>, able to withstand short frosts down to around -15°C in very well-drained soil. This Australian bush requires little maintenance and tolerates light pruning which keeps it compact and dense. Plant it without hesitation in coastal gardens spared from severe frosts where, depending on variety, it will form dense, flowering screening hedges for a very long period or a superb cushion on a bank or in rockery for the lowest species and varieties. It is a good plant for dry gardens, requiring an exposed, sunny position. Growing in a container allows both control of growing medium composition and overwintering the bush in an unheated greenhouse or a very bright, lightly heated conservatory.

Grevillea rosmarinifolia Rosa Jenkinsii in pictures

Flowering

Foliage

Plant habit

Height at maturity 1.30 m

Spread at maturity 1.30 m

Habit irregular, bushy

Growth rate normal

Flowering

Flower colour pink

Flowering time March to April, September

Inflorescence Cluster

Flower size 5 cm

Bee-friendly Attracts pollinators

Foliage

Foliage persistence Evergreen

Foliage colour green

Botanical data

Genus

Grevillea

Species

rosmarinifolia

Cultivar

Rosa Jenkinsii

Family

Proteaceae

Other common names

Rosemary Grevillea, Spider Flower

Origin

Cultivar or hybrid

Product reference • 833341

Planting and care

Grevillea 'Rosa Jenkinsii' is best planted in spring, after the last frosts. It prefers soil with a pH ranging from acidic to neutral, sandy, loamy, poor, and very well-drained. The presence of limestone in the soil causes yellowing of the foliage, chlorosis, which weakens the bush until it eventually dies. This disease can be corrected with regular iron supplements. In regions where the soil and subsoil are limestone, dig a large hole of 60 cm (23.6 in) in all directions, filled with ericaceous soil or compost and non-limestone sand. Growing in a pot allows better control of the substrate and protects the plant from frost in areas with borderline hardiness (down to -9/-10°C (15.8/14 °F) for a well-established plant).

Grevilleas are drought-resistant once well established: monitor watering during the first 2 summers but this will become optional or even unnecessary later on. In the ground, they appreciate a thick layer of mulch. Use wood chips or grass clippings. It is recommended to use a fertilizer very in low phosphorus as it decrease the bush's drought resistance by destroying the thick root hairs that develop just below the soil surface. A fertilizer with N-P-K proportions of 18-2-10 is well-suited.

Olant Grevillea species and varieties with low growth in pots. Use a lightweight, well-drained potting mix that remains moist. We recommend the following mixture: 60% pine bark, 20% coarse river sand, 10% fine river sand, and 10% clay soil for its water retention capacity. The pH should be 7 or less.

Insects and diseases:

Grevilleas can develop black leaf spots, caused by a rarely fatal fungus: it can be treated with a fungicidal treatment.

Collar rot, a fatal disease caused by fungi that develop in wet and warm soil, is also a risk. Avoid burying the plant's collar, which will allow for better air circulation. Avoid watering too often during hot and dry weather, let the soil dry out between two waterings.

Phytophthora (cinnamomi), a disease also caused by a fungus, affects many plants in dry areas. The parasite destroys the roots during excessively rainy winters. The plant can suddenly wither in summer due to a lack of water caused by the destruction of some or all of its roots. Partial or complete death of the vegetation or branches can be observed in severe cases. Prevention is crucial, as the disease is almost impossible to eradicate: ensure that the soil drainage is perfect, remove the water from the saucer placed under the pot, and remove dead or diseased parts.

Pruning:

Grevilleas tolerate annual pruning well, during their growth period or just after flowering. Shorten the branches by one-third of their length. A regularly pruned bush will be more branched and more floriferous.

Planting period

Best planting time March to April

Recommended planting time March to May

Intended location

Suitable for Meadow, Woodland edge

Type of use Back of border, Free-standing, Container, Hedge, Slope, Greenhouse, Conservatory

Hardiness Hardy down to -9.5°C (USDA zone 8b) Show map

Ease of cultivation Amateur

Exposure Sun

Soil pH Acidic, Neutral

Soil type Silty-loamy (rich and light), Stony (poor and well-drained)

Soil moisture Dry soil, Moist soil, poor, sandy, light, well-draining