Kohia hero image

Kohia

Passiflora tetrandra

Not Threatened

Introduction

Passiflora tetrandra, known as Kohia or New Zealand Passion Vine, is our only native passion flower species. This vigorous climber produces fragrant greenish-white flowers and distinctive orange fruits that split to reveal black seeds in bright red arils. An important food source for native birds, this forest vine can climb to the canopy of tall trees and was traditionally used by Māori for its strong, flexible stems. native trees

New Zealand Passion Vine (<i>Passiflora tetrandra</i>) showing its distinctive
                    fruits

Image credit: Kohia (Passiflora tetrandra). Wikipedia

Quick Facts

Overview

Scientific Name Passiflora tetrandra
Height Up to 10 meters (33 ft) as a climber
Spread Spreads several meters; twining vine that can cover large trees
Water Needs Moderate; prefers moist, well-drained soils
Light Full sun to partial shade
Frost Tolerance Low to moderate; young plants need protection from frost
Salt Tolerance Moderate; tolerates some coastal exposure
Growth Rate Fast; vigorous climber in suitable conditions
Lifespan Perennial; long-lived in forest settings

Climate Best Suited to

Passiflora is native to New Zealand and thrives in the country's diverse climate conditions. It adapts well to various regional climates throughout the country.

Regional Suitability

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

Soil Requirements

Passiflora prefers well-draining soil with good organic content. It can adapt to various soil types but performs best in loamy or sandy soils.

Water Needs

Passiflora requires moderate watering, especially during establishment. Once established, it becomes more drought-tolerant.

Light Requirements

Passiflora grows best in full sun to partial shade, depending on the specific species and local climate conditions.

Temperature

Passiflora is well-adapted to New Zealand's temperate climate and can tolerate both warm summers and cool winters.

Plant Ecology

This section provides important information about Passiflora tetrandra and its role in New Zealand's native ecosystems. Understanding these aspects helps gardeners and conservationists make informed decisions about plant care and landscape design.

By incorporating this knowledge into gardening and restoration practices, we can better support the health and diversity of New Zealand's unique native plant communities.

Uses and Applications

Practical Applications

Passiflora has various practical and ornamental uses. From traditional Māori applications to modern landscaping, this versatile plant serves multiple purposes.

Historically, Passiflora was used by Māori for medicinal purposes, food, and cultural practices. These traditional uses reflect the deep knowledge of native plants.

Seasonal Care

Spring

Spring is the ideal time to plant Passiflora as the soil warms and new growth begins. Water regularly to establish roots and apply a light mulch to retain moisture.

Summer

During summer, Passiflora may require additional watering during dry spells. Monitor for pests and provide shade if needed in hot climates.

Autumn

Autumn is perfect for transplanting Passiflora as the cooler temperatures reduce stress. Reduce watering as growth slows.

Winter

Winter care for Passiflora involves minimal maintenance. Protect from severe frosts if necessary and avoid overwatering.

  • Plant in well-drained soil
  • Apply light mulch
  • Water regularly to establish roots
  • Monitor for drought stress
  • Provide shade in hot climates
  • Check for pest infestations
  • Transplant established plants
  • Reduce watering as growth slows
  • Collect seeds for propagation
  • Protect from severe frosts
  • Avoid overwatering
  • Minimal maintenance required

Pruning

Pruning Techniques

Regular pruning maintains plant health and desired shape. Remove dead, damaged, or crossing branches to improve air circulation.

Planting Guide

When to Plant

The best time to plant Passiflora is during spring or autumn when soil temperatures are moderate and rainfall is reliable.

How to Plant

Dig a hole twice the width of the root ball and slightly deeper. Place Passiflora in the hole, backfill with soil, and water thoroughly. Mulch around the base to retain moisture.

Propagation

Propagation Methods

Cultural History

Passiflora tetrandra (Kōhia) has traditional uses and cultural significance for Māori, valued for its edible fruit and as a climbing plant in native forests.

Pests and Diseases

Common Pests

Passiflora is generally resistant to most pests due to its native adaptations. However, it may occasionally be affected by common garden pests such as aphids or scale insects.

Disease Prevention

To prevent diseases, ensure good air circulation around Passiflora and avoid overwatering. Remove any diseased plant material promptly to prevent spread.

Growing Advice

Expert Tip

For best results, mulch around the base of Kōhia to retain moisture and suppress weeds. Prune lightly after flowering to encourage new growth and more blooms the following season.

Species Information

This comprehensive guide provides detailed information about the plant's classification, characteristics, and ecological role within New Zealand's unique flora. Understanding these aspects helps gardeners and conservationists make informed decisions about cultivation and preservation efforts.

Species Details

Kohia belongs to its respective plant family and is characterized by its unique morphological features and ecological adaptations. This species is well-adapted to its natural environment throughout New Zealand.

Natural Habitat

Passiflora tetrandra is naturally found in specific habitats throughout New Zealand. Understanding its natural environment helps in providing appropriate growing conditions in cultivation.

Plant Description

Physical Characteristics

Passiflora tetrandra exhibits distinctive characteristics that make it easily identifiable in its natural habitat. Its growth habit, leaf structure, and seasonal changes all contribute to its unique appearance and ecological role.

Understanding these physical characteristics helps gardeners and conservationists identify the plant correctly and provide appropriate care. The plant's form and features also make it valuable for landscaping and restoration projects.

Requirements

Soil and Light Needs

Provide well-drained soil, partial shade, and a sheltered position for best growth. Kōhia thrives in moist, fertile soils and benefits from regular mulching and protection from strong winds. Regular watering during dry periods is also beneficial for healthy growth.

Planting Section

Planting Requirements

Plant Kōhia in spring or autumn, ensuring the soil is moist and well-prepared. Space plants to allow for climbing and provide a support structure for healthy growth.

Care and Maintenance

Maintenance Tips

Regular pruning and mulching help maintain healthy growth. Water during dry periods and monitor for pests or diseases.

Ecological Role

Role in Native Ecosystems

Kōhia provides food for native birds and insects, supporting local biodiversity. Its flowers attract pollinators, while the fruit is an important food source for birds such as kererū and tūī. The vine's dense growth offers shelter and nesting sites, contributing to the health and resilience of New Zealand's forest ecosystems.

Landscaping Uses

Garden Design Ideas

Kōhia is ideal for covering fences, trellises, or growing up trees in native gardens. Its vigorous growth and attractive foliage make it a great choice for natural screens, wildlife gardens, and adding vertical interest to landscapes.

Growing Requirements

Soil and Light Preferences

Kōhia prefers moist, well-drained soil and partial shade. Protect from strong winds and provide a support structure for climbing. Regular mulching and watering during dry periods help ensure healthy, vigorous growth throughout the year.

Conservation

Conservation Efforts

Kōhia is not threatened but benefits from habitat protection and restoration efforts. Conservation actions include controlling invasive species, supporting native forest regeneration, and raising awareness about the ecological value of this unique native vine.

Plants Grid

Companion Planting Options

Explore other native climbers and companion plants for Kōhia. These species thrive in similar conditions and help create a resilient, biodiverse garden that supports native wildlife and provides year-round interest.

Cultural Significance

Traditional Uses

Kōhia (Passiflora tetrandra) holds cultural significance for its distinctive flowers and traditional uses in Māori culture. The plant's distinctive passionflower-like blooms connected it to concepts of beauty and uniqueness in Māori culture. Kōhia was traditionally used in medicine and ceremonial decorations.