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Prostanthera phylicifolia (Spiked Mint-bush) - An erect robust evergreen shrub that grows to 5 to 6 feet tall by 3 feet wide. The narrow blunt dark green leaves have a rolled margin much like rosemary. Flowering occurs in late spring into summer with dark purple flowers borne in the leaf axils.
Plant in sun or part shade with regular watering. Very tolerant of heavy soils. We don't have long term experience with this plant through extremely cold years but think it probably hardy to at least 15-20° F given that it is marketed for colder climate gardens in Australia.
Prostanthera phylicifolia occurs naturally in coastal sand heath and subalpine areas from 2,000 to 3,000 feet elevation in New South Wales, Queensland and Victoria, Australia. The name for the genus comes from the Greek words 'prostheke' meaning "an appendix" and 'anthera' meaning an "anther" in reference to the appendage on the stamens and the specific epithet means foliage like that of plants in the genus Phylica in the Rhamnaceae family that has most of its species coming from South Africa. We first purchased stock of this interesting Mint Bush from Suncrest Nurseries and sold it from 2002 to 2008.
The information displayed on this page about Prostanthera phylicifolia is based on our research conducted about this plant from books in our nursery library as well as from information that is provided by reliable online resources. We also have included our own observations made about it as it grew in the nursery gardens and other gardens visited, as well how the crops of this plant performed in the containers when we had them in our nursery field. We also include comments received from others and welcome hearing from anyone who has information about this plant, particularly if it includes cultural information aiding others to better grow it.
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