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Turepo

Streblus heterophyllus

Not Threatened

This native plant, known as Turepo (scientific name: Streblus heterophyllus ), also called small-leaved milk tree, is a versatile species endemic to New Zealand. It is widespread throughout the North and South Islands, typically found in lowland forests and forest margins. Characterized by its glossy, leathery leaves with serrated edges and small, inconspicuous flowers, its juvenile form features slender, interlaced branches with lobed leaves, while adult leaves are mostly unlobed. It can grow up to 12-15 meters tall and is known for its dense, durable wood. Its edible red berries are a food source for native birds. This comprehensive guide provides detailed information on its care, propagation, and importance within the New Zealand ecosystem. Understanding this plant contributes to the appreciation of our rich biodiversity and heritage. native trees

Turepo (Streblus heterophyllus) showing its distinctive leaves and form
Image credit: Turepo (Streblus heterophyllus) – Photo by Wikipedia contributors, via Wikipedia

Quick Facts

Plant Specifications

Table data
Scientific Name Streblus heterophyllus
Height 6-15m
Spread ~4m
Water Needs Moderate
Light Full sun to part shade
Frost Tolerance High
Salt Tolerance Moderate
Growth Rate Medium
Lifespan Long

Climate Best Suited to

Turepo (Streblus heterophyllus) is widespread throughout the North and South Islands of New Zealand, typically found in lowland forests and forest margins. It is highly adaptable, thriving in well-drained soils and tolerating a range of light conditions from full sun to partial shade. Its natural habitat suggests a good tolerance for various New Zealand climates, including frost.

Regional Suitability

Table data
City Climate Suitability
Whangārei Ideal
Auckland Ideal
Hamilton Ideal
Tauranga Ideal
Rotorua Ideal
Gisborne Ideal
New Plymouth Ideal
Napier Ideal
Whanganui Ideal
Palmerston North Ideal
Wellington Ideal
Nelson Ideal
Christchurch Ideal
Dunedin Ideal
Invercargill Ideal

Growing Requirements

Soil Requirements

Turepo (Streblus heterophyllus) is adaptable to a range of soil conditions, but thrives in well-drained environments. It can tolerate both damp and well-drained soils, making it quite versatile. Good drainage is important to prevent root rot, especially for young plants.

  • Tolerates a wide range of soil types from clay to sandy
  • Prefers well-draining soils but can handle occasional waterlogging
  • Thrives in moderately fertile soils but will grow in poor soils too
  • Can tolerate slightly acidic to slightly alkaline pH
  • Handles coastal conditions including salt spray

Light Requirements

Turepo (Streblus heterophyllus) prefers full sun for optimal growth and vigor, but it also exhibits good tolerance to partial sun or partial shade. It can even grow in shaded environments, making it a versatile choice for various garden aspects.

  • Full sun for optimal growth and form
  • Can tolerate partial shade but may develop a leggier form
  • At least 6 hours of direct sunlight daily is ideal
  • Northern or eastern exposures work well in garden settings

Water Requirements

Turepo (Streblus heterophyllus) requires weekly watering for optimal health, especially when young or newly planted. It thrives in well-draining soil to prevent root rot, mimicking its natural habitat's drainage characteristics. Once established, it can tolerate both damp and well-drained conditions, showing good adaptability to varying moisture levels.

  • Moderate watering during establishment (first 1-2 years)
  • Drought-tolerant once established
  • Can handle periods of soil saturation
  • Reduce watering in winter when growth slows
  • Signs of overwatering include yellowing leaves and crown rot

Uses & Significance

Garden Uses

Turepo (Streblus heterophyllus) is a versatile tree suitable for native gardens, restoration projects, and as a specimen plant. Its robust nature, attractive foliage, and ability to adapt to various conditions make it a valuable addition to diverse landscape designs, providing both aesthetic appeal and ecological benefits.

  • Specimen tree for visual impact
  • Suitable for native gardens and restoration projects
  • Enhances native garden aesthetics and biodiversity
  • Provides architectural accent with its unique structure
  • Effective for erosion control on slopes and banks

Cultural Significance

Turepo (Streblus heterophyllus) holds cultural significance for Māori, who traditionally used its dense and durable wood for various purposes. Its presence in the landscape is also tied to traditional knowledge and resource gathering.

  • Important for tools, weapons, and construction in traditional Māori culture
  • Wood is one of New Zealand's hardest native timbers
  • Served as a marker tree for trails, boundaries, and sacred sites

Ecological Value

Ecologically, Turepo (Streblus heterophyllus) plays a crucial role in supporting native ecosystems. Its edible red berries are a vital food source for native birds, contributing to the local biodiversity and food web.

  • Provides a vital food source for native birds with its edible red berries.
  • Offers habitat and nesting sites for various fauna.
  • Contributes to the biodiversity of lowland forests and forest margins.

Seasonal Care Calendar

Spring

In spring, Turepo (Streblus heterophyllus) begins its active growth phase. New foliage emerges, and it's an ideal time for planting new specimens or propagating. Ensure adequate moisture and monitor for early signs of pests.

  • New growth begins with fresh foliage development
  • Apply a balanced, slow-release fertilizer if desired
  • Excellent time for planting new specimens or dividing offsets
  • Monitor for new pest activity and address promptly

Summer

Summer is the peak growing season for Turepo (Streblus heterophyllus), often accompanied by flowering and fruiting. Consistent watering is important, especially for young plants, to support vigorous growth and prevent stress during dry periods.

  • Flowering occurs mid-spring to summer, with fruiting from late spring to autumn.
  • Water young trees regularly during extended dry periods.
  • Monitor for general pests.
  • Avoid heavy pruning during the active growing season.

Autumn

During autumn, Turepo (Streblus heterophyllus) continues to fruit, providing food for native birds. It's also a good time for planting and general garden cleanup as the plant prepares for cooler months.

  • Fruiting continues, attracting native birds.
  • Good time for planting new specimens to establish before winter.
  • Clean up fallen leaves if a tidy appearance is desired.

Winter

Winter is generally a dormant period for Turepo (Streblus heterophyllus). Minimal care is required, though young plants may benefit from protection in colder regions. This is an opportune time for any necessary structural pruning.

  • Generally dormant with minimal growth activity
  • No special winter protection needed in most mild climates
  • Suitable time for structural pruning if required
  • Fallen leaves can be left as mulch or removed for tidiness

When to Prune and How Much

Pruning Guidelines

Turepo (Streblus heterophyllus) generally requires minimal pruning to maintain its natural form and health. Pruning should focus on removing dead or damaged growth and shaping the plant as needed.

  • Remove dead, damaged, or diseased branches at any time of year
  • Light formative pruning when young helps establish good structure
  • To create a multi-trunked specimen, cut the main stem to encourage branching
  • Fallen leaves can be removed for a tidier appearance, or left as natural mulch
  • If necessary, lower branches can be removed to create clearance underneath
  • Major pruning is best done in late winter to early spring before new growth

Always use clean, sharp tools for pruning to minimize the risk of disease and ensure clean cuts. The plant often responds well to pruning with vigorous new growth, contributing to a fuller, healthier appearance.

Planting Guide

When to Plant

The ideal time to plant Turepo (Streblus heterophyllus) is during autumn or spring. These seasons offer moderate temperatures and reliable rainfall, providing optimal conditions for root establishment before the extremes of summer heat or winter cold.

Site Selection

Choose a site with:

  • Full sun to partial shade for best growth and form
  • Well-draining soil, though adaptable to most soil types
  • Protection from strong, persistent winds, especially for young plants
  • Adequate space for its mature size, considering both height and spread
  • Good air circulation to prevent fungal issues

Planting Procedure

  1. Dig a hole twice as wide and the same depth as the root ball
  2. Amend heavy clay soils with compost or well-rotted manure to improve drainage and fertility
  3. Position the plant so the crown sits at soil level, ensuring it is not planted too deep
  4. Backfill with soil, gently firming down to remove any air pockets around the roots
  5. Create a small watering basin around the plant to help retain moisture
  6. Water thoroughly immediately after planting to settle the soil
  7. Apply a 5-10cm layer of organic mulch, keeping it away from the trunk to prevent rot

Initial Care

Water regularly during the first growing season, especially during dry periods, to ensure proper establishment. Once established, Turepo (Streblus heterophyllus) is quite adaptable to varying moisture levels but will benefit from occasional deep watering during prolonged dry spells to maintain lush growth.

How to Grow Turepo (Turepo)

Turepo (Streblus heterophyllus), also known as the small-leaved milk tree, is a versatile native species endemic to New Zealand. It is widespread throughout the North and South Islands, typically found in lowland forests and forest margins. Characterized by its glossy, leathery leaves and small, inconspicuous flowers, its juvenile form features slender, interlaced branches with lobed leaves, while adult leaves are mostly unlobed. This hardy native establishes well from fresh seed, and semi-hardwood cuttings can also root with care. Young plants prefer sun to light shade, free-draining soils, shelter from strong winds, and steady moisture during their first seasons. Understanding its propagation methods is key to successfully cultivating this important native tree.

From Seed

Difficulty: Easy

Propagating Turepo from fresh seed is a reliable and straightforward method. Collect ripe fruit in late summer to autumn, ensuring the seeds are fully mature. Remove all pulp from the seeds and wash them clean; sow promptly for best viability. Use a free-draining, sterile seed-raising mix, such as a blend of sand and compost. Sow the seeds shallowly (approximately 5 mm deep) and keep the medium evenly moist in bright, indirect light at temperatures between 15–22 °C. Germination typically occurs within several weeks. Once seedlings have developed a few true leaves and their root systems are stable, carefully prick them out into individual small pots, minimizing root disturbance. Grow them on in a sheltered environment with good light and reliable moisture before gradually hardening them off for planting out.

From Semi-Hardwood Cuttings

Difficulty: Medium

Semi-hardwood cuttings of Turepo can be taken from healthy, non-flowering shoots in late spring to summer. Select cuttings that are 8–12 cm long. Remove the lower leaves, reduce the remaining leaf area by half to minimize transpiration, and treat the cut bases with an IBA (Indole-3-butyric acid) rooting hormone. Insert the cuttings into a very free-draining medium (e.g., coarse perlite with fine bark) under high humidity (e.g., a mist bench or covered propagator), bottom heat around 18–22 °C, and bright filtered light. Keep the medium moist but not waterlogged. Rooting can be modest and variable, often taking several months. Pot on only once a firm root system has formed, and then gradually acclimatize the new plants to outdoor conditions. This method is generally more successful for experienced propagators or in specialized nursery settings with controlled environmental conditions.

Pests & Diseases

Turepo (Streblus heterophyllus) is generally a robust and resilient plant, but like all species, it can be susceptible to certain pests and diseases. Understanding these potential issues and implementing preventative measures can help maintain the plant's health and vigor.

Common Pests

  • While generally resistant, monitor for common garden pests such as aphids or scale insects, especially on young growth.

Common Diseases

  • Ensure good air circulation and well-drained soil to prevent fungal diseases, which can occur in overly wet conditions.

Environmental Stressors

  • Drought Stress: While adaptable, prolonged dry periods can lead to wilting and leaf drop. Ensure adequate watering during dry spells, especially for young plants.
  • Waterlogging: Poor drainage can cause root rot. Improve soil drainage to prevent this.
  • Frost Damage: Turepo is considered frost tolerant, but young plants may still benefit from protection in severe frosts or colder regions.

Most established Turepo (Streblus heterophyllus) plants are resilient enough to recover from minor pest and disease issues without intervention. For valuable specimen trees or severe infestations, consult with a professional arborist or horticulturist for specific treatment recommendations and integrated pest management strategies.

Bonus Tip

Special Features

To maximize the aesthetic appeal of your Turepo (Streblus heterophyllus), consider strategic placement in your garden. Its distinctive form, especially the juvenile interlaced branches, can create unique visual interest. As it matures into a tree, its dense foliage and durable wood make it a strong presence in the landscape.

Natural Habitat

Typical Environments

Understand the natural habitat of Turepo (Streblus heterophyllus), including its geographical distribution, preferred environmental conditions, and the types of ecosystems where it thrives. This knowledge is crucial for replicating its natural growing conditions in cultivation.

  • Geographical distribution in New Zealand.
  • Preferred climate and soil conditions.
  • Typical associated plant communities.

Plant Ecology

Environmental Adaptations

Delve into the ecological interactions and adaptations of Turepo (Streblus heterophyllus) within its natural habitat. This section provides insights into its role in plant communities, its reproductive strategies, and how it responds to environmental changes.

  • Interactions with other plant species.
  • Reproductive biology and dispersal.
  • Adaptations to its native environment.

Plant Conservation Efforts

Conservation Status

Explore the conservation status of Turepo (Streblus heterophyllus) and the efforts being made to protect this valuable species. This section highlights the importance of conservation, current initiatives, and how individuals can contribute to its preservation for future generations.

  • Conservation status and threats.
  • Current protection initiatives.
  • How to get involved in conservation.

Detailed Growing Requirements

Care Focus

A more in-depth look at the specific conditions and care practices required for successfully growing Turepo (Streblus heterophyllus). This section delves into advanced topics and provides comprehensive guidance for enthusiasts and professional growers alike.

  • Advanced soil preparation techniques.
  • Detailed light and temperature preferences.
  • Specialized watering methods.

Landscaping Applications

Design Ideas

Discover how Turepo (Streblus heterophyllus) can be effectively integrated into various landscaping designs. This section offers creative ideas and practical advice for using this plant to enhance the beauty and functionality of your outdoor spaces, from residential gardens to public parks.

  • Design ideas for different garden styles.
  • Best uses in various landscape settings.
  • Combining with other plants for aesthetic appeal.

Ecological Role

Ecosystem Roles

The ecological importance of Turepo (Streblus heterophyllus) within its native ecosystem is significant. This section explores its role in supporting biodiversity, its interactions with local wildlife, and its contribution to the overall ecological balance of its habitat.

  • Contribution to local biodiversity.
  • Interactions with native fauna (e.g., birds, insects).
  • Role in ecosystem health and stability.

Turepo (Streblus heterophyllus) holds cultural importance in Aotearoa New Zealand through its roles in traditional knowledge and native ecosystems.