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Pittosporum tobira x heterophyllum Green Mound - Japanese pittosporum

Pittosporum tobira x heterophyllum 'Jule1' Green Mound
Japanese Pittosporum, Australian laurel

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This compact, spreading evergreen bush forms an elegant green mound, abundantly flowered and highly fragrant in spring. Its small white flowers turn yellow towards the end of the flowering period. Resistant to both cold and heat, it thrives in sun or partial shade, in the ground or in containers. Perfect for low hedges, borders, or terraces, it can be pruned into a ball or trained as a standard. Hardiness: -10/-12°C.
Flower size
1 cm
Height at maturity
1.50 m
Spread at maturity
1.50 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -12°C
Soil moisture
Dry soil, Moist soil
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Best planting time March to April
Recommended planting time February to May, October
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Flowering time April to May
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Description

Pittosporum 'Green Mound' is a hardy evergreen bush with a compact, rounded habit, forming a dense, regular cushion of bright green foliage. Particularly floriferous, it becomes covered in spring with small, intensely fragrant white flowers, turning creamy yellow as they fade. Resistant to heat and drought, and fairly hardy, it adapts to many situations and offers a beautiful alternative to Pittosporum tobira 'Nana', in regions more exposed to cold. It is adorable in the ground and in pots, as a low hedge, in topiary, or even trained as a standard to enhance a terrace.

Pittosporum 'Green Mound' is a hybrid resulting from the cross-breeding of Pittosporum tobira and P. heterophyllum, developed by the French breeder Frédéric Julien. This cultivar combines the robustness of the former with the increased hardiness of the latter.

Pittosporum 'Green Mound' is characterised by a naturally compact and rounded habit; it forms a regular mound of bright, glossy green foliage. The bush reaches 1 m to 1.50 m in all directions in the ground. In a pot, its dimensions are slightly reduced, around 0.8 to 1 m in height and spread, depending on growing conditions. Its growth is moderately fast, and it can easily be pruned to control its development. Its alternate, obovate to elliptical leaves measure 3 to 5 cm long by 1.5 to 3 cm wide. They are thick, leathery, with an entire margin that is slightly rolled under. Their upper surface is a glossy green. This foliage is evergreen in winter. Flowering occurs from April to May, and it is much more abundant than that of its two parents. It takes the form of rounded terminal clusters composed of small white flowers, 1 to 2 cm in diameter, emitting a fragrance reminiscent of orange blossom. These flowers turn creamy yellow towards the end of the flowering period. Pittosporum 'Green Mound' does not produce fruit. This hybrid is sterile, meaning it forms neither capsules nor viable seeds. The bush thrives in sun or partial shade and adapts to a wide range of well-drained soils. It tolerates summer drought once established, but benefits from regular watering during heatwaves. Its hardiness is rated at -12/-13°C.

Pittosporum 'Green Mound' is appreciated for its versatility in landscape design. It can be used as a low hedge, in a border, or in a large pot on a terrace. Its dense foliage and large cushion-like appearance provide structure to plant compositions. In contemporary or Mediterranean-inspired gardens, it pairs well with purple or silver foliage such as that of Loropetalum chinense 'Black Pearl' and Artemisia 'Powis Castle'. It also works wonderfully in more classic settings alongside boxwood balls, Lonicera nitida 'Maigrün', or dwarf conifers. It is very decorative in topiary as it can be pruned into a ball or a short lollipop to accentuate its structural effect, or even trained as a standard to create volume on a terrace. This bush, which can withstand severe pruning if necessary, lends itself to multiple uses.

Tips: Apply a good organic fertiliser each year for better flowering. In a pot, pruning is almost unnecessary.

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

Pittosporum tobira x heterophyllum Green Mound - Japanese pittosporum in pictures

Pittosporum tobira x heterophyllum Green Mound - Japanese pittosporum (Flowering) Flowering

Plant habit

Height at maturity 1.50 m
Spread at maturity 1.50 m
Habit irregular, bushy
Growth rate normal

Flowering

Flower colour white
Flowering time April to May
Inflorescence Cyme
Flower size 1 cm
Fragrance Fragrant, orange flower
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Evergreen
Foliage colour green

Botanical data

Genus

Pittosporum

Species

tobira x heterophyllum

Cultivar

'Jule1' Green Mound

Family

Pittosporaceae

Other common names

Japanese Pittosporum, Australian laurel

Origin

Cultivar or hybrid

Product reference24710

Planting and care

Plant Pittosporum 'Green Mound' in spring in areas at the limit of its hardiness, and in early autumn in mild or warm and dry climates. It should be planted in fertile, well-drained, deep soil. It is relatively hardy (-10 to -13°C); choose a location in full sun or partial shade, sheltered from prevailing winds. Mulch the base immediately. Once well-rooted, it tolerates dry summers fairly well. Position it along a south-facing wall in regions with harsh winters. In cooler climates, cover it with winter fleece or shelter it in a frost-free conservatory for winter. Apply a good organic fertiliser each year for better flowering.

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17,50 €

Planting period

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

Intended location

Suitable for Meadow, Woodland edge
Type of use Border, Edge of border, Free-standing, Small gardens, Container
Hardiness Hardy down to -12°C (USDA zone 8a) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Any
Soil type Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, deep, loose, well-drained

Care

Pruning instructions Pruning is not essential for this variety, but you can pinch the young shoots to encourage it to become more branching during the first few years after planting. For mature plants, trim back any straggly stems on the clump at the end of the season. It can be shaped into a ball or a short standard. It is best to prune just after flowering.
Pruning Pruning recommended once a year
Pruning time June
Soil moisture Dry soil, Moist soil
Disease resistance Very good
Overwinter Can be left in the ground

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