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Prostanthera rotundifolia - R.Br.
                 
Common Name Mint Bush
Family Lamiaceae or Labiatae
USDA hardiness 8-11
Known Hazards None known
Habitats Sheltered hillsides, usually in sylvan habitats[152, 154]. Sandy soils over sandstone on rainforest edges and sheltered spots in sclerophyll forest[260].
Range Australia - New South Wales, Queensland, Tasmania, Victoria.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Half Hardy Moist Soil Full sun

Summary

Prostanthera rotundifolia Mint Bush


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Prostanthera rotundifolia Mint Bush
   
Physical Characteristics
 icon of manicon of shrub
Prostanthera rotundifolia is an evergreen Shrub growing to 4.5 m (14ft) by 3 m (9ft).
It is hardy to zone (UK) 9 and is frost tender. It is in flower in May. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects.Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: acid and neutral soils. It cannot grow in the shade. It prefers moist soil.

Synonyms

Habitats
Woodland Garden Sunny Edge;
Edible Uses
None known
Medicinal Uses


Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

Antibacterial;  Antifungal;  Carminative.

The plant is rich in volatile oils, including menthol and cineole (as found in the mints, Mentha spp.)[238]. The leaves are antibacterial, antifungal and carminative[152, 154, 238]. They are used externally in the treatment of colds and headaches[238]. Presumably the leaves are infused in a bowl of hot water and the vapour inhaled[K].
Other Uses
Essential;  Pot-pourri.

An essential oil obtained from the leaves is medicinal[154]. The leaves yield up to 0.7% of the oil[154]. The dried leaves are used in pot-pourri[238].
Cultivation details
Requires a sunny position in a well drained soil and does not thrive on shallow chalky soils[11, 200]. Prefers a humus-rich lime-free soil[182]. This species only succeeds outdoors in the mildest areas of the country[182]. It is hardy to at least -7°c in Australian gardens[157] though this cannot be translated directly to British gardens due to our cooler summers and longer colder and wetter winters. It does succeed outdoors in various places in Cornwall[1, 59], though it is probably best on a wall even there[11]. A short-lived plant, but it can be grafted onto the roots of Westringia fruticosa which allows it to be grown in less favourable conditions and also probably increases its life span[11, 157]. Plants are very tolerant of light trimming[K], but dislike hard pruning[238]. Any trimming is best carried out immediately after flowering[238]. Both leaves and flowers have a minty aroma[245].
Propagation
Seed - sow spring in a greenhouse[200].The seed usually germinates within a few weeks. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. The seed remains viable for 2 - 3 years in normal storage[154]. Cuttings of soft-wood in early summer in a frame. They root readily[11]. Cuttings of half-ripe wood, July/August in a frame[200].

Books by Plants For A Future

Other Names
Found In
Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status
IUCN Red List of Threatened Plants Status :
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Expert comment
 
Author
R.Br.
Botanical References
11154200
Links / References
For a list of references used on this page please go here
Readers comment
 
Elizabeth H.
Kristina Wed Nov 30 2005
To support the hardiness of this plant, I have both grown it and seen it grown successfully on numerous occasions throughout Britain and as far north as York at least. My horticultural college just outside York had a very well established and happy looking bush and I would consider it worth trying in any location. It is possible that it is only bothered by cold if it also has its feet continually damp and if it is neglected. This shrub is worth a try, its scent is incredible! And the flowers are attractive too.
Elizabeth H.
Kate Toynbee Tue Jul 1 2008
I live in the centre of the highlands of Scotland and have this wonderful plant. The flowers on mine are white although one of your reference pages says they are pink. The aroma is wonderful.
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Subject : Prostanthera rotundifolia  

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