Photo by Melody

PlantFiles: 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)

3 vendors have this plant for sale.

3 members have or want this plant for trade.

Tropicals and Tender Perennials

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)

Sun Exposure:
Sun to Partial Shade


Bloom Color:
Light Blue
White/Near White

Bloom Time:
Blooms repeatedly

Grown for foliage

Other details:
Average Water Needs; Water regularly; do not overwater

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

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By Happenstance
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There are a total of 17 photos.
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3 positives
No neutrals
No negatives

Gardeners' Notes:

Positive straea 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 hard frost. I've also found it to be xeric once it adjusts to its new home. I didn't give it any compost or fertilizer and it did great for me; perhaps others are getting flimsy or floppy stalks due to rich soil?

Positive DarwinESF 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.

Positive jkom51 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.


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

Alameda, California
Clayton, California
Fairfield, California
La Jolla, California
Los Angeles, California
San Diego, California
San Jose, California
San Leandro, California
Santa Ana, California
Orlando, Florida
Port Saint Lucie, Florida
Gainesville, Georgia
Davenport, Iowa
Somerville, Massachusetts

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