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Zone
Zones 14-17, 19-24
Full Sun
Full
Regular Water
Moderate

Prostanthera

Mint Bush
Lamiaceae (Labiatae)
Evergreen, Shrubs

Australian natives with minty smelling foliage and an enormous profusion of small flowers, usually in shades of purplish blue or white. Although they tend to be short-lived, they grow quickly and put on a good show. Prune them carefully; avoid cutting into bare wood or doing any other hard pruning. There are many species available; look for them at specialists’ nurseries or at plant sales held by botanical gardens. These plants require excellent drainage.

Prostanthera nivea

Grows to 7 ft. tall and 4 ft. wide, with an open-growing habit. White flowers.

Prostanthera nivea induta

Upright, compact form. Grows to 6 ft. tall and 3 ft. wide. Narrow, silvery leaves somewhat longer than 1 in. Produces blue flowers in the spring.

Prostanthera rotundifolia
Prostanthera rotundifolia

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Prostanthera rotundifolia

Grows to 6 ft. tall and nearly as wide, producing purple-blue flowers in spring. Selections include ‘Ghost Cave’, with grayish green leaves and purple flowers; ‘Glen Davis’, with an especially profuse showing of dark purple flowers; and ‘Rosea’, to only 3–4 ft., with dark green leaves and deep rose-pink flowers.

 

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Prostanthera nivea

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