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Pittosporum tenuifolium Beach Ball - Kohuhu

Pittosporum tenuifolium ‘TREW01’ Beach Ball
Tawhiwhi, Kohuhu, Black Matipo, New Zealand Pittosporum

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This plant carries a 24 months recovery warranty

More information

This small evergreen shrub naturally forms a dense ball of medium green foliage, which is lighter in spring, borne on slender, almost black stems. Without pruning, it forms a handsome small cushion approximately 1.20m in all directions, which can replace boxwood without its associated health issues. Its hardiness (-8/-10°C) makes it more suitable for gardens in mild climates and coastal areas.
Flower size
1 cm
Height at maturity
1.20 m
Spread at maturity
1.30 m
Exposure
Sun
Hardiness
Hardy down to -9.5°C
Soil moisture
Dry soil, Moist soil
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Best planting time March to April, September
Recommended planting time February to May, September to October
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Flowering time May to June
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Description

Pittosporum tenuifolium Beach Ball (‘TREW01’) is a pittosporum with a naturally rounded habit and evergreen foliage, which can be an excellent substitute for boxwood in mild climates. It can be used in borders and low hedges by the sea or in well-sheltered gardens. Its small, bright green leaves form a very neat mass, attractive in all seasons. It also makes a beautiful specimen in a large pot on a terrace, when it will need protection in winter.

This cultivar belongs to the Pittosporaceae family and derives from the species Pittosporum tenuifolium, the New Zealand pittosporum or small-leaved pittosporum. The type species is an evergreen shrub endemic to the islands of New Zealand, found mainly on forest edges and along sheltered coasts.
'Beach Ball' is a horticultural selection by New Zealand nurseryman Peter Trewavas, distributed under the cultivar name ‘TREW01’ by several Publishers, notably Plantipp and GlobePlanter. It is a particularly compact selection. The shrub has a naturally rounded habit, very branched from the base. Its growth is slow to moderate: it reaches 1 m to 1.20 m in height and 1.20 to 1.50 m in width after about ten years in the ground, slightly less in a pot. The thin and flexible stems quickly take on a very dark brown to almost black hue, which highlights the foliage. The fibrous and rather shallow root system spreads out in a mat without suckering or lifting paving. The foliage is evergreen, remaining on the plant in winter. The small leaves measure 2 to 3 cm long; they are ovate, thick, with a very slightly wavy margin. The young spring leaves are a light, zesty green, then become medium green to shiny grey-green. 
Flowering occurs from June to July, depending on the region. Small, campanulate, purplish-brown flowers open in the leaf axils. They are composed of five thick petals and are small but emit a sweet fragrance, more noticeable in the evening and in mild weather.

In the garden, Pittosporum tenuifolium 'Beach Ball' can be used as an accent in large borders, in low hedges, or in a pot on a sheltered terrace. Its dense, ball-like appearance complements the straight lines of a path or a low wall. It can be paired with the coloured foliage of Phormium ‘Jester’ or Cotinus coggygria ‘Dusky Maiden’ to create strong contrasts. As a groundcover, you can plant Liriope muscari 'Ingwersen' or lesser periwinkle 'Josefine'.

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Pittosporum: planting, growing and pruning
Family sheet
by Valérie 11 min.
Pittosporum: planting, growing and pruning
Read article

Pittosporum tenuifolium Beach Ball - Kohuhu in pictures

Pittosporum tenuifolium Beach Ball - Kohuhu (Foliage) Foliage
Pittosporum tenuifolium Beach Ball - Kohuhu (Plant habit) Plant habit

Plant habit

Height at maturity 1.20 m
Spread at maturity 1.30 m
Habit irregular, bushy
Growth rate slow

Flowering

Flower colour purple
Flowering time May to June
Flower size 1 cm
Fragrance Fragrant honey and vanilla fragrance, in the evening and at night.
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Evergreen
Foliage colour green

Botanical data

Genus

Pittosporum

Species

tenuifolium

Cultivar

‘TREW01’ Beach Ball

Family

Pittosporaceae

Other common names

Tawhiwhi, Kohuhu, Black Matipo, New Zealand Pittosporum

Botanical synonyms

Trichilia monophylla, Pittosporum colensoi, Schoutensia monophylla

Origin

Cultivar or hybrid

Product reference257510

Planting and care

Plant Pittosporum Beach Ball in spring in a fertile, loose, well-drained soil. It tolerates lime and particularly appreciates soils rich in silt. When planting, mix leaf mould and coarse sand into your garden soil at a rate of 50%. Water your young plant copiously once or twice a week to encourage establishment. Once established (after 2 or 3 years), this shrub will not require watering in summer. In very dry regions, occasional summer watering will be welcome. 
Not very hardy (-8°/-10°C), choose a warm location, in full sun and sheltered from prevailing winds. Mulch the base immediately. Position it along a south-facing wall in regions with harsh winters. In cooler climates, cover it with a winter fleece or shelter it in a frost-free conservatory over winter. In the event of a severe winter (prolonged cold, snow), prune hard; the plant will regrow and the "ball" will reform. Prune flush to the ground in the most severe cases; it is likely to regrow from the stump, quite late in spring.

Pittosporum tenuifolium can be susceptible to Phytophthora, a fungus that attacks the collar and roots in soils that are both permanently warm and damp.

Planting period

Best planting time March to April, September
Recommended planting time February to May, September to October

Intended location

Suitable for Meadow
Type of use Border, Edge of border, Small gardens, Container
Hardiness Hardy down to -9.5°C (USDA zone 8b) Show map
Ease of cultivation Amateur
Exposure Sun
Soil pH Neutral
Soil type Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil well-drained, loose and fertile

Care

Pruning instructions Trim back branches that appear untidy on the clump after flowering.
Pruning Pruning recommended once a year
Pruning time June to July
Soil moisture Dry soil, Moist soil
Disease resistance Good
Overwinter Needs protection

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