Kanono (Coprosma grandifolia) showing its distinctive large leaves and bright orange berries

Kanono

Coprosma grandifolia

Not Threatened

Kanono is an impressive evergreen shrub or small tree reaching 4-8 meters tall, notable for having the largest leaves of any Coprosma species - up to 12cm long with prominent veining and a distinctive glossy texture. This robust species produces masses of bright orange to red berries that create spectacular autumn and winter displays. Found in lowland and coastal forests throughout New Zealand, it forms dense thickets that provide excellent wildlife habitat. The combination of large attractive foliage and abundant berries makes it one of the most garden-worthy among New Zealand's native shrubs

Kanono (Coprosma grandifolia) showing its distinctive large leaves and bright orange berries

Image credit: Kanono (Coprosma grandifolia). Wikipedia

Quick Facts

Quick Facts Overview

Scientific NameCoprosma grandifolia
Height4-8 meters
Spread3-5 meters
Water NeedsModerate
LightFull sun to partial shade
Frost ToleranceModerate (hardy to -8°C)
Salt ToleranceModerate (coastal tolerant)
Growth RateModerate
Lifespan60-120 years

Climate Best Suited to

Kanono grows throughout New Zealand from sea level to 800 meters elevation in lowland and coastal forests. It thrives in temperate climates with moderate to high rainfall and performs best in areas with mild temperatures and good humidity. This species is well-adapted to New Zealand's oceanic climate conditions.

Regional Suitability

CityClimate Suitability
WhangāreiIdeal
AucklandIdeal
HamiltonIdeal
TaurangaIdeal
RotoruaIdeal
GisborneIdeal
New PlymouthIdeal
NapierIdeal
WhanganuiIdeal
Palmerston NorthIdeal
WellingtonIdeal
NelsonIdeal
ChristchurchIdeal
DunedinIdeal
InvercargillModerate

Growing Requirements

Soil Requirements

Kanono adapts well to various soil types:

  • Well-drained to moderately moist soils preferred
  • Tolerates clay, loam, and sandy soils
  • Performs best in fertile, organic-rich soils
  • Suitable for slightly acidic to neutral pH (6.0-7.5)
  • Benefits from organic mulch around base

Light Requirements

Kanono performs well in various light conditions:

  • Full sun to partial shade (very adaptable)
  • Best berry production occurs in good light
  • Can tolerate filtered forest light conditions
  • Morning sun exposure particularly beneficial

Water Requirements

Kanono has moderate water requirements:

  • Regular watering during establishment (first 1-2 years)
  • Moderate drought tolerance once established
  • Consistent soil moisture preferred during growing season
  • Tolerates brief dry periods but performs better with regular water
  • Benefits from mulching to maintain soil moisture

Uses & Significance

Garden & Restoration Uses

  • Large‑leaf native for bold texture and quick shelter
  • Wildlife value through heavy fruiting
  • Understory tree in mixed native borders
  • Riparian and edge plant for fast cover

Seasonal Care Calendar

Spring

  • New large leaves emerge with fresh glossy appearance
  • Tiny greenish flowers appear on female plants
  • Optimal time for planting new specimens
  • Begin regular watering for establishment

Summer

  • Robust growth period with large, lustrous foliage
  • Flowers pollinated by wind during warm months
  • Young berries begin developing on female plants
  • Monitor for adequate moisture during dry periods

Autumn

  • Spectacular display of bright orange to red berries
  • Peak bird activity around fruiting shrubs
  • Good time for planting before winter
  • Collect ripe berries for propagation

Winter

  • Berries persist providing essential winter bird food
  • Good cold tolerance with minimal winter damage
  • Best time for structural pruning if needed
  • Reduce watering frequency during dormant period

When to Prune and How Much

When to Prune and How Much Overview

Kanono tolerates pruning well and can be shaped as needed:

  • Remove dead, diseased, or damaged branches any time
  • Can be pruned moderately to control size and shape
  • Responds well to pruning with vigorous new growth
  • Late winter to early spring best for major pruning
  • Light regular pruning maintains better form than heavy infrequent cuts

Use sharp, clean tools and be careful of the large leaves when pruning. Kanono's robust nature makes it very tolerant of pruning mistakes.

Planting Guide

When to Plant

Plant Kanono from spring through autumn when soil conditions are suitable. This hardy species establishes readily and tolerates a wide range of planting conditions.

Site Selection

Choose a site with:

  • Full sun to partial shade (adaptable to most conditions)
  • Any well-drained soil type
  • Space for mature size (8m tall, 5m spread)
  • Consider positioning for bird watching opportunities

Planting Procedure

  1. Dig hole twice as wide and same depth as root ball
  2. Improve very poor soils with compost
  3. Position plant at same level as in container
  4. Backfill with soil, watering to eliminate air pockets
  5. Create watering basin around plant
  6. Water thoroughly after planting
  7. Apply 8cm layer of organic mulch around base

Initial Care

Provide moderate watering during first 1-2 years until established. Kanono is relatively easy to establish and requires minimal ongoing maintenance.

Propagation Methods

From Seed

Kanono propagates readily from the colorful berries:

  1. Collect ripe orange to red berries from female plants in autumn
  2. Remove pulp by mashing and washing seeds clean
  3. Sow fresh seeds immediately in seed mix at 3mm depth
  4. Keep moist but not waterlogged
  5. Germination occurs within 4-8 weeks under good conditions
  6. Transplant seedlings when 10-15cm tall

Remember that Coprosma species are dioecious - you'll need both male and female plants for berry production.

From Cuttings

Vegetative propagation is highly successful:

  1. Take hardwood or semi-hardwood cuttings from healthy growth
  2. Cuttings root easily without hormone treatment
  3. Use standard cutting mix with good drainage
  4. Rooting typically occurs within 6-10 weeks
  5. High success rates (70-90%)

Natural Regeneration

Kanono often establishes naturally through bird dispersal:

  • Birds readily disperse seeds leading to volunteer seedlings
  • Self-seeds moderately around parent plants
  • Volunteer seedlings can be transplanted to desired locations
  • Natural regeneration helps maintain genetic diversity

Cultural History

Kanono has served as an important resource in New Zealand's cultural landscape, valued for its robust nature and abundant wildlife benefits:

Traditional Uses

  • Medicine: Leaves and bark used in traditional rongoā Māori for treating digestive issues and skin conditions
  • Wildlife Management: Dense berry production supported traditional bird hunting areas
  • Indicators: Large leaves and vigorous growth indicated fertile, well-watered sites
  • Shelter: Dense growth provided quick shelter and windbreak in exposed areas

Recognition and Characteristics

  • Distinguished from other Coprosma species by notably large leaves
  • Associated with productive forest margins and clearings
  • Traditional knowledge recognized its superior berry production
  • Valued for its reliable fruiting and wildlife attraction
  • Often found around traditional settlement areas due to bird dispersal

European Settlement Era

  • Early settlers appreciated its hardiness and fast establishment
  • Used for quick shelter plantings and farm hedging
  • Recognized for exceptional bird-attracting properties
  • Sometimes managed for bird habitat on pastoral properties

Modern Restoration Use

Today, Kanono is a key species in habitat restoration and native gardens. Its combination of hardiness, rapid establishment, and exceptional wildlife value makes it essential for creating functional native ecosystems in both rural and urban environments.

Pests & Diseases

Scale Insects

  • Damage: Various scale species may infest the large leaves
  • Symptoms: Sticky honeydew, yellowing leaves, reduced vigor
  • Management: Usually controlled by beneficial insects; horticultural oil if severe

Sooty Mould

  • Cause: Fungus growing on honeydew from scale insects
  • Symptoms: Black coating on large leaves
  • Management: Control underlying scale problem; wash leaves if necessary

Leaf Spot Diseases

  • Cause: Fungal pathogens during humid conditions
  • Symptoms: Brown spots on large leaves, premature leaf drop
  • Management: Ensure good air circulation; remove affected foliage

Browsing Damage

  • Possums: May browse on young shoots and berries
  • Management: Install guards on young plants; possum control if severe

Kanono's robust growth means it typically recovers well from most pest and disease issues. Its hardiness makes it one of the more resilient Coprosma species.

Bonus Tip

Bonus Tip Overview

Plant both male and female Kanono plants to ensure maximum berry production - the large, glossy leaves and masses of bright orange berries create one of the most spectacular wildlife feeding displays among native plants. Position where you can observe the constant activity of tui, bellbirds, and other natives feeding, especially during winter months when the persistent berries provide crucial food resources.

Cultural Significance

Cultural Significance Overview

Learn more about the cultural significance of native shrubs in Cultural Plants.

Plant Description

Plant Description Overview

Coprosma grandifolia (raurekau; kanono) is a handsome shrub to small tree with broad, soft, light‑green leaves and clusters of orange berries. The foliage provides lush contrast in native plantings.

Natural Habitat

Natural Habitat Overview

Moist forest margins, gullies, and riparian edges where soils are free‑draining yet retain moisture. Prefers dappled light to part sun.

Plant Ecology

Plant Ecology Overview

Provides nectar and pollen to insects and abundant fruit to birds. The generous leaf area creates cool understorey microclimates that support invertebrates.

Ecological Role

Ecological Role Overview

Rapidly builds mid‑storey structure in restoration, shading weeds and increasing habitat complexity while supplying key seasonal food resources.

Site Requirements

Site Requirements Overview

  • Light: Light shade to part sun; tolerates full sun with moisture.
  • Soil: Free‑draining, humus‑rich loams.
  • Moisture: Moderate; appreciates even moisture.
  • Exposure: Wind tolerant; shelter improves leaf quality.

Mulch 5–8 cm; water well through the first summer. Minimal feeding required. Prune to lift skirts or shape as needed after fruiting.

Planting

Planting Overview

  1. Plant in autumn or spring; set at pot depth.
  2. Firm, water to settle, and mulch to conserve moisture.
  3. Space 1.2–1.5 m in screens; 2–3 m as specimens.

Care and Maintenance

Care and Maintenance Overview

Remove dead or rubbing branches; tip‑prune to encourage bushy form. Maintain mulch; irrigate during extended dry periods.

Landscaping Uses

Landscaping Uses Overview

Excellent for lush texture in sheltered borders and near water features. Pairs with tree ferns, karo, and flaxes for layered, evergreen planting.

Conservation

Conservation Overview

Not Threatened. In restoration, eco‑source plants and manage weeds until canopy closes to support natural recruitment and bird foraging.

Cultural Section

Details

This plant has cultural associations in Aotearoa and is valued in restoration and gardens for ecological services; use eco‑sourced stock near natural areas.

Coprosma species held important cultural significance for Māori, with the orange berries of larger species like karamū (C. robusta) eaten by children as a traditional food source. Kanono (C. grandifolia) was particularly valued for its bark, which provided a vibrant orange dye used in traditional crafts and ceremonial items. These versatile shrubs were integrated into daily life, providing both sustenance and materials for cultural practices.