Kōhūhū (Pittosporum tenuifolium)

Kōhūhū

Also known as: Black matipo, Thin leaved pittosporum

Kōhūhū (*Pittosporum tenuifolium*) is a plant species native and endemic to New Zealand. Kōhūhū has flowers which are fragrant at night. This species' scientific name means "slender leaves." kōhūhū grows in coastal and lower mountain forest areas. This plant attracts multiple species of insects, as well as fungal pathogens. Indigenous Māori people extract oil from this species for its scent.

Scientific classification

Species

Kōhūhū (Pittosporum tenuifolium)

Carrots, ivies and allies

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Perennial

Lifespan

Tree

Plant Type

Spring, Summer

Bloom Time

Fall

Harvest Time

4 m to 8 m

Plant Height

Purple

Flower Color

Silver, Black

Stem Color

Winter dormancy

Dormancy

Evergreen

Leaf type

15 - 35 ℃

Ideal Temperature

Images of Kōhūhū

Distribution of Kōhūhū

Distribution Map

Kōhūhū, a plant naturally endemic to the islands in the southwestern Pacific Ocean, has found a place in temperate regions across various continents. It has been successfully introduced and cultivated in parts of South America and Europe, where it thrives in gardens and parks.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Coastal to lower montane forests

Hemisphere Trend Curve

Northern

Sorthern

Culture

Symbolism

Counterfeit

Interesting Facts

Native to New Zealand, The kōhūhū or Kohuhu has been used in traditional medicine for its antimicrobial benefits. Other uses for the tree included the extraction of oils and resins from the fragrant leaves to produce a type of perfume or fragrance. The leaves and branches have been used by the Maori in baptisms and other sacred ceremonies.

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Cultivars

There are several recognized cultivars of Kōhūhū, including the following common varieties :

Kohuhu 'Golf Ball'Kohuhu 'Abbotsbury Gold'Kohuhu 'Victoria'Pittosporum 'Garnettii'Kohuhu 'Warnham Gold'Kohuhu 'Gold Star'Kohuhu 'Marjorie Channon'Kohuhu 'Silver Queen'Kohuhu 'Tom Thumb'Kohuhu 'Variegatum'

Toxicity

Kōhūhū contains harmful saponins in all parts leading to gastrointestinal issues when ingested. Toxic to humans, cats, and dogs, symptoms include nausea, vomiting, diarrhea, headache, and fatigue. Prevent accidental ingestion by children and pets; seek veterinary help immediately if pets show signs of poisoning.

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Quickly Identify Kōhūhū

Dark, almost black new stems

Glossy, medium green oval leaves with slightly wavy edge

Sweet-scented dark purple flowers in compact clusters

Small orange fruits after blooming period

Tolerant of seaside conditions and temperatures down to 15-20 °F ( -9 - -6 °C)

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Care Guide for Kōhūhū

Every 1-2 weeks

Water

Full sun

Sunlight

15 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Kōhūhū originates from New Zealand's temperate regions, preferring coastal and forest-like conditions. It tolerates moderate drought but needs consistent moisture, with watering every 1-2 weeks. Typically grown outdoors, kōhūhū thrives in well-draining soil and benefits from rainwater.

Fertilize: For kōhūhū, use balanced fertilizers in spring and high nitrogen during growth; apply every 4-6 weeks. Use modest amounts based on size, reduce in winter, and water after application. This promotes vigorous growth and resilience while avoiding over-fertilization, benefiting all gardeners.

Pruning: Kōhūhū thrives with early to late winter pruning, focusing on dead or crossing branches to maintain shape and airflow. Light pruning prevents frost exposure, promotes compact growth, and enhances flowering. Always use clean, sharp tools to avoid disease transmission.

Propagation: Kōhūhū, native to New Zealand, is a resilient ornamental shrub with attractive foliage. Propagate using semi-hardwood cuttings from healthy shoots, dipped in rooting hormone. Plant in well-draining medium, maintain moisture, and provide indirect light until roots establish, indicating successful growth.

Repotting: Repot kōhūhū every 2-3 years in late winter using a pot 2 inches larger in diameter. After repotting, place kōhūhū in bright light and water sparingly until new growth appears. Ensure proper drainage to prevent root rot and support healthy recovery.

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