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Blue Rock Candy Penstemon

Blue Rock Candy Penstemon

PENSTEMON barbatus Rock Candy 'Blue'

Blooms Spring through Fall
Safe delivery guaranteed
Ships as 4"
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Common Name(s)
Border or Garden Penstemon, Beard Tongue
Sunlight
Full Sun (6+ hrs)
Perennial Zones
5, 6, 7, 8
Watering
Let dry
Max Height
6"–1'
Max Spread
6"-12"
Special Features
Cut flowers
Bloom Season
Spring, Summer, Fall
Lifespan
Perennial
Growing Habit
Mounding, Columnar, Clumping, Compact
Drought Resistance
High drought resistance
Bloom Color
Purple, White, Blue
Foliage Color
Green
Stem Color
Green
Themes
Cool Blue
Genus
Penstemon
Family
Plantaginaceae
Ship Size
4"

Blue Rock Candy Penstemon lines up short, upright spikes of lavender-blue bells, every one of them opening on a crisp white throat, above a neat basal clump. Penstemon barbatus Rock Candy Blue comes as a live 4-inch plant, buds and open flowers already showing.

Under a foot tall, it belongs at the front of a sunny border, along a walkway, or in a container where the flowers land at eye level from a chair. It carries on from spring into early autumn, pulls in bees, butterflies and hummingbirds, and the spikes are the right length for small arrangements. Water it through the first season, then ease off; settled plants would rather run dry.

Fun fact: the old name beard tongue points to a fifth stamen that carries no pollen and often wears a tuft of hairs at the throat of the flower.

  • Sunlight: Full Sun (6+ hrs)
  • Water: Let dry
  • Drought Tolerance: High
  • Mature Size: 6"–1' tall × 6"-12" wide
  • Bloom Season: Spring, Summer, Fall
  • Lifespan: Perennial
  • Perennial Zones: 5–8
  • Special: Cut flowers

Shear the first flush as it fades for a second show later on - and it is guaranteed to reach you healthy.