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 Weather Station

Products > Plectranthus argentatus
Plectranthus argentatus - Silver Plectranthus

[2nd Image]
Habit and Cultural Information
Category: Perennial
Family: Lamiaceae (Labiatae) (Mints)
Origin: Australia (Australasia)
Evergreen: Yes
Flower Color: Violet
Bloomtime: Spring/Summer
Synonyms: [P. argnetatus 'Longwood Silver']
Height: 2-3 feet
Width: 4-6 feet
Exposure: Shade
Irrigation (H2O Info): Medium Water Needs
Winter Hardiness: 25-30 F
Plectranthus argentatus (Silver Plectranthus) - A native of Australia (south-western Queensland and north-eastern New South Wales), this evergreen perennial (shrub) is treated as an annual in frost prone climates. It is a fast growing plant to 2 to 3 feet tall by 4 to 6 feet wide with 5 inch long by 3 inch wide soft, fuzzy silver foliage and an abundance of 8 to 12 inch long spikes of reddish-purple buds that open to very pale violet (almost white) flowers summer to fall (August-October). The flowers are nice but they are not as showy as the foliage. Plant in full sun to partial shade - plants seem more lush with some shade and it can even take a dark shade. This plant is reasonably drought-resistant in good soil when mulched but looks best if given regular to occasional irrigation and tolerates moist soils. Hardy and evergreen to 25 F; has resprouted from the ground after temperatures just below 20 F. This plant can be damaged by strong winds or by traffic along paths due to very brittle branches and can be a little scraggly so prune occasionally to keep tight and promote new growth - cutting back hard every couple years in late winter to early spring can rejuvenate the plant and keep it quite handsome. The name for the genus comes from the Greek words 'plektron' meaning a "spur" and 'anthos' meaning "flower" in reference to the spur that is found at the base of the corolla tube of the type species Plectranthus fruticosus. The specific epithet comes from the Latin word 'argent' meaning "silver" and the adjectival suffix 'atus' meaning "possessing" or "a likeness" for the leaves being a silver-like color. Our plants came from Rick Dark of Longwood Gardens in 1991 and appear to be the same as what is sold by some nurseries as 'Longwood Silver'.  The information on this webpage is based on research conducted about this plant in our nursery library, from online sources, as well as from observations made of it as it grows in the nursery in containers, in the nursery's garden and in other gardens where we have observed it growing. We will also incorporate comments received from others and welcome getting feedback from those who may have additional information, particularly if this information includes cultural information that would aid others in growing  Plectranthus argentatus.