Silver Spurflower, Silvery Plectranthus, Brazilian Coleus

Plectranthus argentatus

Family: Lamiaceae (lay-mee-AY-see-ee) (Info)
Genus: Plectranthus (plek-TRAN-thus) (Info)
Species: argentatus (ar-jen-TAY-tus) (Info)


Tropicals and Tender Perennials

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Sun to Partial Shade


Grown for foliage

Foliage Color:



12-18 in. (30-45 cm)


12-15 in. (30-38 cm)


USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

USDA Zone 11: above 4.5 C (40 F)

Where to Grow:

Unknown - Tell us



Bloom Color:

Light Blue

White/Near White

Bloom Characteristics:

Unknown - Tell us

Bloom Size:

Unknown - Tell us

Bloom Time:

Blooms repeatedly

Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

From herbaceous stem cuttings

From woody stem cuttings

From seed; sow indoors before last frost

From seed; direct sow after last frost

Seed Collecting:

Collect seedhead/pod when flowers fade; allow to dry

Allow seedheads to dry on plants; remove and collect seeds


This plant has been said to grow in the following regions:

Alameda, California

Clayton, California

Fairfield, California

Hayward, California

La Jolla, California

Los Angeles, California

San Diego, California

San Jose, California

San Leandro, California

Santa Ana, California

Fernandina Beach, Florida

Orlando, Florida

Port Saint Lucie, Florida

Gainesville, Georgia

Davenport, Iowa

Somerville, Massachusetts

Spring, Texas

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Gardeners' Notes:


On Jul 7, 2015, BayAreaTropics from Hayward, CA wrote:

I didn't even buy this showed up no doubt as a seedling in a botanical garden purchase. So,slightly invasive.

Durable,takes little water,but not none. Fits right in with Cactus and Succulent plantings as different.

And yes- reseeds all over. BUT! its not a fast grower. Easy to keep in bounds.


On Apr 30, 2015, jkorman from Fernandina Beach, FL wrote:

The cultivar Plectranthus 'Nancy Carter' over winters in Northeast Florida. It will overwinter better under protected canopy and part-sun conditions although it has come back under full-sun, open spaces.


On May 25, 2008, straea from Somerville, MA (Zone 6b) wrote:

I first grew this plant last year, ordering it from Select Seeds (which taught me to call it by the common name "Quicksilver"), and now I wouldn't want to be without it again. It's one of those plants that is a bit resentful of transplanting, and needs a little patience and tending for a short while afterwards. Don't worry; your efforts will be rewarded. After it adjusts to its new home, it will form a tough-stalked plant with big, fuzzy, silvery leaves that would be perfect in a children's garden. By the time frosts rolled around last year, this fairly tender plant had gotten so robust that even when its biggest leaves were damaged by light to medium frosts, it would then put out new leaves as soon as the temperature got above about forty degrees F again, and it didn't die until a har... read more


On Feb 27, 2003, DarwinESF from Syracuse, NY (Zone 5a) wrote:

Last spring a seedling of this plant from an unknown source started growing in my lavander cuttings, I've been trying to identify it for a long time, finally finding it online last month. The plant is the easiest I've ever started from cutting, pretty much all it takes is a small stem, they've rooted for me in just under a week in wet vermiculite. I have some large plants inside this winter, and they've been flowering anytime I let a shoot get long enough. I'm assuming they don't need pollinators to be fertilized, since I've been getting seeds from these flowerings as well. I've never let it in a garden i nthe summer (I've had it in pots) so I don't know about seed survivorship overwintering information. Anyway, it's an amazing looking plant, hope this is useful for someone.


On Nov 11, 2002, jkom51 from Oakland, CA (Zone 9b) wrote:

This grows well in Zone 9 Nor. Cal coastal. Easily damaged by winds due to very brittle branches. Grows very fast but does not take transplanting well. Reasonably drought-resistant in good soil when mulched.