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Dark Sky Salvia - 72-Cell Plug Tray

$749.45
$749.45 $1,342.08
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Size : 72-Cell Plug Tray
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About the Product

Dark Sky is a large salvia with deep indigo-blue flowers, the darkest color in its series. Tall, branching flower stems rise from a thick rosette of big green leaves, and plenty of side shoots keep it blooming.

It starts flowering a bit later than most perennial salvias and grows quickly into a clump over 2 feet tall and wide. It suits larger borders, mass plantings and bold combinations with yellow or white flowers.

What it looks like

Tall, branched flower stems 12 to 18 inches long lined with small two-lipped florets in deep indigo-blue, set in dark purple calyxes, with many secondary side spikes. The spikes rise high above a dense basal rosette. Leaves are large, broad, oval to lance-shaped, 4 to 6 inches long, mid-green and crinkled. The plant is a full clump 24 to 28 inches tall and 28 to 32 inches wide. At peak it is a broad mass of dark indigo spires over leafy green foliage.

Growing it with lavender

Salvia wants the same full sun and lean, well-drained soil as lavender, and its upright spikes echo lavender's form while filling the gap before and after the main lavender bloom.

Care

Plant in full sun in average, well-drained soil; it is drought tolerant once established and grows quickly. Hardy in zones 3-8; after the first bloom, cut spent spikes down to the leafy base to encourage side branches and more flowers.

At a glance

  • Botanical name: Salvia
  • Flower color: Deep indigo-blue
  • Foliage: Mid-green
  • Growth habit: Large, rounded clump with basal rosette
  • Mature size: 24–28 in tall × 28–32 in wide
  • USDA hardiness zones: 3–8
  • Light: full sun
  • Bloom start: Early-June
  • Peak bloom: Late-June
  • Bloom pattern: Repeat Blooming
  • Deer resistance: Resistant
  • Pollinator value: Excellent

Sizes and shipping

One full 72-cell plug tray: 72 young starter plugs of this variety (cells about 1⅓ in. wide × 2½ in. deep), rooted and ready to pot up into quarts or gallons. Best for growers and nurseries. Potted plants and plug trays ship during our live-plant seasons, March 1–May 31 and October 1–November 30; June through September is local pickup only. Plugs, potted plants and trays do not ship to AZ, CA, HI, ID, NV, OR, UT or WA.

View Product Details
Mature height
28.0 in
Mature spread
32.0 in
Bloom
Early-June – peak Late-June
Fragrance
Mild
Deer
Resistant

Lavender companion · grow guide

How to grow Dark Sky

Perennial Salvia / Russian Sage · Salvia

Give full sun and well-drained soil. Perennial salvias (S. nemorosa, S. × sylvestris) rebloom when cut back; Russian sage (S. yangii) is a woody, late-waking subshrub pruned only in spring.

Check my zone & planting dates
Dark Sky
  • Full sunLight
  • Low waterFast drainage
  • pH 6.0–8.0Soil
  • Zones 3a–8bHardiness
  • 28″ tall32″ wide
  • ResistantDeer · rabbits resistant
  • Not known toxicPets
Huckleberry, the farm dog

Huckleberry saysTell me where you grow and I’ll check if Dark Sky will thrive there.

Hardy in zones 3a–8b

Spring is best; early fall works if 6 weeks remain before freeze.

When it arrives

Your plug tray

Plugs arrive in active growth. Water the tray right away, set it in bright light out of harsh wind, and plant within a few days. If you wait, bump them into 3–4" pots. Harden off for a week before planting out, and keep the root ball moist the first 3–4 weeks.

When to plant

Spring is best; early fall works if 6 weeks remain before freeze.

How deep

Set the crown level with the soil, never buried.

Spacing

Perennial salvias 18–24"; Russian sage about 3 ft.

Soil

Sandy, gravelly or loamy · pH 6.0–8.0

Fix-it tip: In heavy clay, raise the bed or add grit. Skip rich compost; lean soil gives sturdier stems. Wet winter soil is the main killer.

Sun

Full sun (tolerates light shade, with fewer flowers).

6+ hours of sun keeps plants compact. Russian sage especially flops in shade.

Dormant
New growth

Don’t give up on it

Is it alive? What spring looks like

Salvia nemorosa types show basal leaves in early spring. Russian sage is late: woody stems look dead until mid- to late spring, when small gray-green buds break. Wait before cutting or removing it.

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