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Polygala grandiflora (Sweet Pea Shrub)

Polygala grandiflora, commonly called Sweet Pea Shrub, is a compact evergreen that flowers for many months in New Zealand gardens. Masses of purple and mauve blooms with crested centres appear from spring through autumn, attracting bees. Plants form a rounded bush about 1.2 metres tall and the same wide with delicate green foliage. Grow in full sun or light shade in well-drained soil. Ideal for borders, pots, and coastal sites, and tolerant of frost and wind.

A Polygala grandiflora stem covered in showy, pink flowers.
A large Polygala grandiflora shrub covered in dark-pink-purple flowers.
Polygala grandiflora (Sweet Pea Shrub) cluster of elegant plants in flower growing as an informal hedge.

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Suited to regions:Subtropical, Temperate
Plant type:Shrubs
Height:1.50 m
Spread:1.00 m
Flowering time:Spring, Summer, Autumn, Winter
Tolerances:
Garden uses:Containers, Living areas, Pool areas
Garden styles:Backyard, City & Courtyard, Frontyard, Japanese, Modern, Rock
Easy to grow?
Maintenance requirements
Growth rate
Also known as
Sku12225

How to grow Polygala grandiflora in NZ

To grow Polygala grandiflora in NZ, choose a sunny or lightly shaded position with well-drained soil. Plant in spring or autumn and water regularly during establishment. Once established, it tolerates dry conditions and light frosts. Apply a slow-release fertiliser in spring to encourage prolific flowering. Prune lightly after flowering to maintain a compact shape and promote new growth. Polygala grandiflora is ideal for borders, pots, and coastal gardens, and requires minimal care once settled.

How to grow a Polygala grandiflora hedge

To grow a Polygala grandiflora hedge in NZ, choose a sunny or lightly shaded site with well-drained soil. Space plants 60–80 cm apart to allow them to form a dense screen. Water regularly during establishment, then only in dry periods as they are drought tolerant once settled. Apply a slow-release fertiliser in spring to support flowering and growth. Prune lightly after each flowering flush to maintain a tidy, compact hedge and encourage continual blooms.

Why buy Polygala grandiflora from The Plant Company?

Buying Polygala grandiflora from The Plant Company ensures you receive healthy, well-established plants grown to thrive in NZ conditions. Our Sweet Pea Shrubs are carefully selected for their vibrant colour, long flowering period, and strong growth habit. We provide expert advice, quality assurance, and reliable nationwide delivery so you can plant with confidence. When you purchase from The Plant Company, you are guaranteed premium plants that will add lasting beauty and impact to your garden or landscape.

Questions and Answers

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There’s more to explore beyond Ficus Black Knight and Rose 'Flower Carpet White' — like the subtle beauty of Knightia excelsa, Carpodetus serratus prostrata, and Corokia Pipsqueak.
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