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Silver sage

Salvia argentea · Lamiaceae

Silver sage (Salvia argentea)
Photo: Nicolás Joseph Jacquin, via Wikimedia Commons (Public domain)

A flat rosette of huge leaves covered in long, silky, silver-white wool, like the ears of a rabbit. Tall candelabras of white flowers follow in its second summer.

Size
12 in tall, 24 in wide
Zones
5 to 8
Light
Full sun
Flowers
Grown for its leaves; flowers mid June to mid July
Pets
No toxicity recorded
Job in a bed
Specimen

A bed built around silver sage

The planner designed this bed around silver sage when this page was made: a 12 × 6 ft (3.7 × 1.8 m) cottage garden in zone 6, full sun. It chose the other plants from the 715 that suit those conditions and its dry soil, and says below why silver sage stands where it does.

A 12 × 6 ft (3.7 × 1.8 m) bed at eye level in late June: Silver sage, Cheddar pinks 'Firewitch', Heath aster 'Snow Flurry', Little bluestem 'The Blues', False sunflower 'Summer Nights', Tennessee coneflower, Ornamental onion 'Purple Sensation', Star of Persia.
A 12 × 6 ft (3.7 × 1.8 m) cottage garden in zone 6, full sun, seen from the path in late June.
5. False sunflower 'Summer Nights'55. False sunflower 'Summer Nights'55. False sunflower 'Summer Nights'54. Little bluestem 'The Blues'44. Little bluestem 'The Blues'44. Little bluestem 'The Blues'44. Little bluestem 'The Blues'44. Little bluestem 'The Blues'41. Silver sage12. Cheddar pinks 'Firewitch'22. Cheddar pinks 'Firewitch'22. Cheddar pinks 'Firewitch'22. Cheddar pinks 'Firewitch'22. Cheddar pinks 'Firewitch'23. Heath aster 'Snow Flurry'33. Heath aster 'Snow Flurry'33. Heath aster 'Snow Flurry'34. Little bluestem 'The Blues'44. Little bluestem 'The Blues'44. Little bluestem 'The Blues'47. Ornamental onion 'Purple Sensation'77. Ornamental onion 'Purple Sensation'77. Ornamental onion 'Purple Sensation'78. Star of Persia88. Star of Persia88. Star of Persia86. Tennessee coneflower66. Tennessee coneflower66. Tennessee coneflower62. Cheddar pinks 'Firewitch'22. Cheddar pinks 'Firewitch'22. Cheddar pinks 'Firewitch'27. Ornamental onion 'Purple Sensation'78. Star of Persia87. Ornamental onion 'Purple Sensation'7
From above, to scale. Each circle is one plant, as wide as the room it needs.

The plants

  1. 2 Cheddar pinks 'Firewitch' × 8, pink
  2. 3 Heath aster 'Snow Flurry' × 3, white
  3. 4 Little bluestem 'The Blues' × 8, tan
  4. 5 False sunflower 'Summer Nights' × 3, yellow
  5. 6 Tennessee coneflower × 3, pink
  6. 7 Ornamental onion 'Purple Sensation' × 5, purple
  7. 8 Star of Persia × 4, purple

Why this plant

  • The only plant grown for its leaves. Leaf lasts all season, where a flower lasts a few weeks.
  • The only bold leaves here. The rest are fine and medium. A change of leaf keeps plants distinct when nothing is in flower.

Why here

  • On the front edge. At 12 in it frames the bed without hiding it, and it is in leaf all season. It finishes 14% of the edge.
  • One plant, alone. A feature plant is seen as an object, and needs clear ground around it.
  • Bold leaf against fine. Cheddar pinks 'Firewitch' is beside it: the strongest contrast of leaf there is.

Why now

  • Here for its leaves, into winter. They cover the 17 weeks between early March and late November when nothing on the plan is in flower.

Planned as a cottage garden: 26 of the 26 plants (100%), bulbs aside, stand alone or in groups of no more than five, small enough for the kinds to mingle. The front edge is finished with silver sage, Cheddar pinks 'Firewitch' and heath aster 'Snow Flurry'. The flowering is at its height from late May, with 3 kinds out together.

The planner's own design check: 13 Excellent, 4 Good. It flags one thing to watch: Nothing on this plan is highly poisonous or an aggressive spreader.

Open this bed in the planner Change its size, the sun or the style, move plants about, or swap one for another.

Where silver sage goes in a border

At 12 in it belongs at the front of a bed. In the planner's ten height classes it is low (6 to 12 in).

Its job: specimen. A feature plant with a shape of its own. It stands alone with room around it, and repeats only at a distance.

Grown for the rosette, one of the most tactile things in the garden. It is a biennial or short-lived perennial: cut out the flower stem to keep the leaves, or let it seed.

  • Silver foliage in a gravel garden
  • A plant to touch
  • Contrast with dark leaves

What to plant with silver sage

Plants recorded as good partners for it, and what each pairing does:

  • Sedum 'Purple Emperor': adds the flowers, early August to mid September; happy in the same dry soil.
  • Blue fescue: fine leaves against its bold ones; a low mound at the foot of its spires; happy in the same dry soil.
  • English lavender 'Hidcote': adds the flowers, late June to late July; fine leaves against its bold ones; a low mound at the foot of its spires.

Questions about silver sage

Does silver sage need sun or shade?

Silver sage grows in full sun (6 or more hours of direct sun a day).

It wants dry, sharply drained soil, on the lean side, with no feeding, and little watering once settled. Once settled in, it stands drought.

What zones does silver sage grow in?

USDA zones 5 to 8. It is hardy to zone 5, which means it survives winter nights down to about −10 °F (−23 °C).

Above zone 8 it struggles: the zones measure winter cold, but a plant's top zone usually means the summers are too hot or the winters too mild for it to rest.

Gardening in Canada? Use the USDA zone for your town: Canada's own zone map uses different numbers.

How far apart should silver sage be planted?

20 in (50 cm) apart, from the middle of one plant to the middle of the next. That is a little closer than its full width of 24 in (60 cm), so a group knits into one patch.

It grows 12 in (30 cm) tall. Give it the full distance from anything taller, or it will lean out towards the light.

How many silver sage plants do I need?

At 20 in apart, set out in staggered rows:

  • 4 to fill 10 square feet (about 1 m²)
  • 7 for a single row 10 ft (3 m) long
  • 14 to fill a 4 × 8 ft bed on its own

In a mixed border, plant it as one, with clear ground around it: a feature plant is seen as an object, and a group of them is a thicket.

In the bed above, the planner used one in one group.

Is silver sage poisonous to dogs and cats?

No toxicity is recorded for dogs, cats, horses or people, according to NC State Extension.

"Not toxic" is not "edible": a pet that eats a lot of any plant can be sick.

Is there a native plant like silver sage?

Silver sage comes from Mediterranean, Southern Europe, Northern Africa. These North American natives come closest to doing its job:

Matched the way the planner's Swap button matches plants: the same job in a bed, then size, then flowering time.

Do deer eat silver sage?

Mostly not. NC State lists it as resistant to deer. No plant is proof against a hungry deer in a hard winter, but this one is low on the menu.

What does silver sage look like in winter?

Silver sage holds some of its leaves into winter, more in a mild year or a sheltered spot, and they look tired by March. Cut the old ones off as new growth starts.

More Salvia

In these guides

Zone guides: Zone 5 · Zone 6 · Zone 7 · Zone 8

Every fact on record

Type
Perennial
Size
12 in (30 cm) tall, 24 in (60 cm) wide
Plant
20 in (50 cm) apart
Height class
Low (6 to 12 in)
Place in the bed
Front
Flowers
Mid June to mid July; upright spires; white
Leaves
Bold texture, semi-evergreen; silver
Shape
Mounding, self-seeding
Hardy in
USDA zones 5 to 8
Light
Full sun
Soil
Lean, dry and sharply drained
Water
Low
Feeding
None needed
Family
Lamiaceae
Comes from
Mediterranean, Southern Europe, Northern Africa
Stands up to
Deer, drought

Checked against NC State Extension. Flowering times are for zone 5: later in colder zones, earlier in warmer ones. Toxicity and spread information is a general gardening guide, not veterinary or medical advice, and invasive status varies by region. If a person or pet eats a plant, contact poison control or a vet. Check your local invasive species list before planting anything with a spread warning.