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Pomaderris apetala
Tainui
Pomaderris apetala
Pomaderris apetala, commonly known as Tainui, New Zealand Hazel, or Rough Pomaderris, is a fast-growing, large shrub or small tree native to New Zealand and southeastern Australia. It typically grows 3 to 10 meters tall, forming a dense, bushy habit. Its leaves are distinctive: dark green and glossy on the upper surface, often paler and covered with fine, rusty hairs on the underside, with prominent veining. Small, yellowish-green flowers are produced in dense clusters in spring, followed by small, dry, capsular fruits. Tainui is a hardy and adaptable species, often found in forest margins, along stream banks, and in regenerating bush. It is valued in gardens for its rapid growth, attractive foliage, and ability to provide shelter and structure, and is tolerant of a range of conditions including coastal exposure and moderate frost.
CategoryDetails
Plant TypePerennial plant
Estimated Plant Lifespan30 years lifespan
Sun Requirements4-6 hours direct sunlight (Partial Sun)
Pollination

Method: animal

Notes: Pollinated primarily by insects, especially bees, which are attracted to its small, inconspicuous flowers.

Watering Requirements

Method: top water

Frequency: When soil surface is dry to the touch, especially for young plants; established plants are moderately drought tolerant but benefit from deep watering during prolonged dry periods.

Notes: Ensure well-drained soil to prevent waterlogging and root rot. Tainui prefers consistent moisture when establishing, but can tolerate some dry spells once mature.

Humidity Requirements

Level: moderate

Care InstructionsPomaderris apetala is generally low maintenance. Pruning can be done to shape the plant, control its size, or encourage bushier growth, particularly when young. It tolerates hard pruning if rejuvenation is desired. Remove any dead or diseased branches to maintain health. Mulching around the base of the plant helps retain soil moisture and suppress weeds.
Temperature Range

Min: -5°C

Max: 35°C

Alternative NamesDogwood
Coprosma robusta
Karamū
Coprosma robusta
Karamu is a hardy native shrub that provides excellent understory cover, complementing the taller structure of Tainui. Both thrive in similar soil conditions and light, and their combined density helps suppress weeds and create a layered habitat for native wildlife.
Phormium cookianum
Mountain flax
Phormium cookianum
Mountain Flax offers contrasting structural form with its upright, sword-like leaves. It is a resilient native plant that tolerates similar growing conditions (full sun to partial shade, various soil types) and can help with erosion control, creating a naturalistic planting scheme with Tainui.
Carex testacea
Orange New Zealand Sedge
Carex testacea
Orange Sedge is a clumping native grass that forms a beautiful, low-maintenance groundcover. It tolerates similar moisture levels and light conditions as Tainui, preventing weed growth around the base of the shrub and adding fine texture to the planting without competing for resources.
Pittosporum eugenioides
tarata
Pittosporum eugenioides

Lemonwood is another fast-growing native tree/large shrub with a similar mature size and light requirements to Tainui. If planted too closely, it can directly compete for light, water, and nutrients, potentially stunting the growth or reducing the vigor of Tainui.

Leptospermum scoparium
Mānuka
Leptospermum scoparium

While Manuka is a valuable native plant, its dense, fibrous root system can be highly competitive for water and nutrients, especially in drier soil conditions. Planting it in very close proximity to Tainui, particularly young specimens, might hinder the establishment and growth of the Tainui.

Aphids

Small, soft-bodied insects that cluster on new growth and leaf undersides, sucking plant sap. Infestations lead to distorted, yellowing, or stunted leaves, sticky honeydew excretion (which can lead to sooty mold), and weakened plant vigor.

Scale Insects

Small, immobile insects that appear as raised bumps (often brown, black, or white) on stems and leaves. They feed by sucking sap, causing yellowing leaves, stunted growth, and sometimes twig dieback. Like aphids, they can excrete honeydew.

Leaf Miners

Larvae of certain insects (flies, moths, beetles) that tunnel within the leaf tissue, creating irregular, winding trails or 'mines' on the leaves. While often cosmetic, heavy infestations can reduce photosynthesis and overall plant health.

Steps:

    • Collect ripe seed capsules from the parent plant in late summer or autumn.
    • Dry the capsules to allow them to split open and release the seeds.
    • Sow seeds thinly on the surface of a well-draining seed-raising mix in trays or pots.
    • Lightly cover the seeds with a thin layer of mix or coarse sand.
    • Keep the soil consistently moist but not waterlogged.
    • Place in a warm, sheltered location with good light. Germination can be erratic and may take several weeks or months.
    • Take semi-hardwood cuttings (10-15 cm long) from healthy, current season's growth in late summer or autumn.
    • Remove the lower leaves, leaving a few at the top.
    • Dip the cut end into a rooting hormone powder or gel (optional, but can improve success rates).
    • Insert the cuttings into a well-draining propagation mix (e.g., perlite and peat or sand).
    • Maintain high humidity around the cuttings (e.g., by covering with a plastic dome or bag) and keep the medium consistently moist.
    • Place in a warm, bright location out of direct harsh sun. Rooting can take several weeks to months.

Neem Oil Spray

An organic insecticide effective against common pests like aphids, scale insects, and leaf miners by disrupting their feeding and life cycles.

Seaweed Extract Liquid Fertiliser

A natural plant tonic that promotes strong root development, enhances stress tolerance, and improves overall plant health and vigor.

Compost Tea

A natural liquid fertilizer rich in beneficial microorganisms that improve soil structure, nutrient availability, and plant immunity.

Organic Bark Mulch

Provides a protective layer over the soil, helping to retain moisture, suppress weeds, moderate soil temperature, and slowly release nutrients as it decomposes.