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Grevillea rosmarinifolia
rosemary grevillea
Grevillea rosmarinifolia
Grevillea rosmarinifolia, commonly known as Rosemary Grevillea, is an evergreen shrub native to Australia. It is prized for its attractive, rosemary-like foliage and vibrant red, pink, or orange flowers that bloom throughout the year, attracting birds and pollinators. The shrub typically grows to a height of 1-3 meters and is known for its adaptability to various soil conditions and its drought tolerance once established.
CategoryDetails
Plant TypePerennial plant
Estimated Plant Lifespan15 years lifespan
Sun Requirements6+ hours direct sunlight (Full Sun)
Pollination

Method: Animal

Notes: The flowers of Grevillea rosmarinifolia are primarily pollinated by birds (especially honeyeaters) and insects, attracted by the nectar. Manual pollination is not typically required.

Watering Requirements

Method: Deep watering

Frequency: Once established, water deeply but infrequently, allowing the soil to dry out between waterings.

Notes: Avoid overwatering, which can lead to root rot. Drought-tolerant once established.

Humidity Requirements

Level: Moderate

Maintenance: While tolerant of various humidity levels, avoid extremely dry conditions, especially during establishment. No specific humidity control is usually necessary.

Care InstructionsPrune lightly after flowering to maintain shape and encourage bushier growth. Avoid heavy pruning, which can reduce flowering. Mulch around the base of the plant to retain moisture and suppress weeds.
Temperature Range

Min: -5°C

Max: 40°C

Cultivars

Melaleuca citrina
crimson bottlebrush
Melaleuca citrina
Both plants share similar water and sunlight needs, and their contrasting flower colors and forms create an aesthetically pleasing garden combination. They also attract similar pollinators.
Westringia fruticosa
Coastal Rosemary
Westringia fruticosa
Similar to Grevillea rosmarinifolia, Westringia fruticosa is a hardy shrub that thrives in well-drained soil and full sun. Their complementary foliage textures and shared tolerance for coastal conditions make them excellent companions.
Banksia spinulosa
Hairpin Banksia
Banksia spinulosa
Banksia spinulosa shares the same habitat and soil preferences, and like the Grevillea, attracts nectar-feeding birds. Their blooms complement each other, extending the flowering season and biodiversity in the garden.
Acacia pycnantha
Golden Wattle
Acacia pycnantha

While also native to Australia, Golden Wattle can grow rapidly and may overshadow the Grevillea, especially in the early stages of growth. They both have similar needs for sunlight and nutrients, but the wattle's faster growth may outcompete it.

Scale insects

Scale insects appear as small, immobile bumps on stems and leaves. They suck sap, weakening the plant and causing yellowing of leaves. Heavy infestations can lead to stunted growth and even plant death.

Spider mites

Spider mites are tiny pests that feed on plant sap. They can cause stippling or bronzing of the leaves, and fine webbing may be visible. Severe infestations can lead to leaf drop and plant stress.

Steps:

    • Take semi-hardwood cuttings (10-15 cm long) from new growth in late summer or early autumn.
    • Remove the lower leaves, leaving only a few at the top.
    • Dip the cut end in rooting hormone (optional).
    • Plant the cuttings in a well-draining potting mix.
    • Keep the soil consistently moist but not waterlogged.
    • Place in a shaded location until roots develop (usually 6-12 weeks).
    • Transplant into individual pots or directly into the garden once roots are established.

Neem Oil

Effective for controlling scale insects and spider mites, it disrupts their life cycles and reduces infestations. Apply as directed on the product label.

Controlled-release native plant fertilizer

Provides essential nutrients to support healthy growth and flowering, while catering to the specific needs of native plants.