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Storm Cloud Blue Star - 72-Cell Plug Tray

$606.30
$606.30 $1,146.24
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Size : 72-Cell Plug Tray
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About the Product

Storm Cloud stands out from the moment it comes up in spring, with near-black stems and very dark green leaves marked with silver veins. In late spring, light periwinkle blue, star-shaped flowers cover the foliage, and more blooms follow for many weeks.

It grows into a wide mound about two to two and a half feet tall and over three feet across, making it a good replacement for small shrubs in the landscape. Young plants start vase-shaped and fill out with age. It has earned top performer marks in university trials, including Michigan State, and it is native, easy care and deer resistant.

What it looks like

Clusters of small, five-pointed, star-shaped flowers about three quarters of an inch across in light periwinkle blue, covering the top of the plant. Leaves are lance-shaped, very dark green with distinct silver veins, carried on near-black stems in spring. The plant is a wide, mounded, shrub-like form 24 to 30 inches tall and 38 to 42 inches wide. At peak bloom the dark foliage is blanketed with pale periwinkle stars, creating strong contrast.

Growing it with lavender

Storm Cloud tolerates sun and leaner soil once established but appreciates a bit more water than lavender; its dark foliage and pale blue stars make a strong backdrop at the back of a sunny bed near lavender.

Care

Grow in full sun to part shade in average soil with regular moisture; it tolerates poorer soil and is heat and humidity tolerant. Hardy in USDA zones 4-9. Give it room to reach full width; established plants rarely need dividing.

At a glance

  • Botanical name: Amsonia tabernaemontana
  • Flower color: Light periwinkle blue
  • Foliage: Very dark green with silver veins
  • Growth habit: Wide, mounded, shrub-like
  • Mature size: 24–30 in tall × 38–42 in wide
  • USDA hardiness zones: 4–9
  • Light: full sun, part sun to part shade
  • Bloom start: Late-May
  • Peak bloom: Early-June
  • Bloom pattern: Long Blooming
  • Deer resistance: Resistant
  • Pollinator value: Good

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
30.0 in
Mature spread
42.0 in
Bloom
Late-May – peak Early-June
Fragrance
None
Deer
Resistant

Lavender companion · grow guide

How to grow Storm Cloud

Blue Star · Amsonia tabernaemontana

Plant it in sun to light shade in average, well-drained soil and leave it alone. Slow to establish, but long-lived and drought tolerant once settled, with gold fall color.

Check my zone & planting dates
Storm Cloud
  • Full sunLight
  • Moderate waterAverage drainage
  • pH 5.5–7.5Soil
  • Zones 4a–9bHardiness
  • 30″ tall42″ wide
  • ResistantDeer · rabbits resistant
  • Mildly toxicPets
Huckleberry, the farm dog

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

Hardy in zones 4a–9b

Spring or early fall. Fall planting should be at least 6 weeks before the ground freezes.

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 or early fall. Fall planting should be at least 6 weeks before the ground freezes.

How deep

Set the crown with growth buds at or just below (about 1") the soil surface.

Spacing

Amsonia hubrichtii and larger types about 3 ft apart; compact selections about 2 ft.

Soil

Average loam; tolerates clay · pH 5.5–7.5

Fix-it tip: Adaptable. In heavy clay, loosen a wide area and add some compost. Don't over-enrich; rich soil makes floppy stems.

Sun

Full sun (tolerates part shade).

Full sun gives the best gold fall color and sturdiest stems. In shade, stems flop; afternoon shade in hot climates helps flowers last longer.

Dormant
New growth

Don’t give up on it

Is it alive? What spring looks like

Shoots appear in mid-spring as clusters of slender stems from the crown. First-year plants stay small; it typically takes 2–3 years to fill out.

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