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Blues Festival® St. John's-Wort Hypericum kalmianum

(1 REVIEW)
Exposure
  • Sun

The optimum amount of sun or shade each plant needs to thrive: Full Sun (6+ hours), Part Sun (4-6 hours), Full Shade (up to 4 hours).

Flower Season
  • Spring
  • Summer
Mature Size
36" 36"
Height
24 - 36"
Spread
24 - 36"

This plant is hardy in zones 4 - 7

Hardy Zones

Zones are based on the lowest average temperature an area is expected to receive during the winter. They are used to determine whether a plant is likely to be perennial in your area. If your zone is equal to or higher than the zone listed for the plant, it will be hardy for you and thrive in your climate.

  • 4
  • 5
  • 6
  • 7
What is my hardiness zone?
 

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  • Details

    Features

    Cool blue foliage for sunny landscapes!

    Attractive blue-green leaves contrast with bright yellow sunburst-like flowers in July and August. This deer-resistant little shrub is a very low-maintenance and colorful option for landscaping, especially edging beds and walkways, or as a ground cover. And it's native to North America!

    Top three reasons to grow Blues Festival St. John's-wort:

    - colorful contrasting flowers and foliage

    - loves dry, sunny spots

    - Very low-maintenance: rarely needs pruning, never needs deadheading, stays neat and tidy.

    Long Blooming
    Drought Tolerant
    Salt Tolerant
    Attracts: 
    Bees
    Resists: 
    Deer
    Native to North America

    Characteristics

    Plant Type: 
    Shrub
    Shrub Type: 
    Deciduous
    Height Category: 
    Medium
    Garden Height: 
    24 - 36 Inches
    Spacing: 
    24 - 48 Inches
    Spread: 
    24 - 36 Inches
    Flower Colors: 
    Yellow
    Foliage Colors: 
    Blue
    Foliage Colors: 
    Green
    Foliage Shade: 
    Blue-green
    Habit: 
    Mounded
    Container Role: 
    Thriller

    Plant Needs

    Light Requirement: 
    Sun
    Maintenance Category: 
    Easy
    Blooms On: 
    New Wood
    Bloom Time: 
    Early Summer
    Bloom Time: 
    Mid Summer
    Bloom Time: 
    Late Summer
    Hardiness Zones: 
    4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b
    Water Category: 
    Average
    Uses: 
    Landscape
    Uses: 
    Mass Planting
    Uses Notes: 

    Landscapes

    Maintenance Notes: 

    Best in moist, well-drained soils. Will tolerate some drought once established. May be trimmed to shape in early spring.

    Blues Festival® Hypericum kalmianum 'SMHKBF' USPP 25,795, Can 5,306
  • 1 Review

    • I adore this subshrub, but it's the bumble bees that get the last say. The flowers are literally quivering from the bumble bee excitement which completely cover the shrub. Awesome. The glaucous blue foliage and mounding habit are icing. Oh, and long bloom time! Not sure why the zones don't include zone 8. I'm zone 8 in western Washington ('8b' in most years, but '8a' this winter), and it's been a spectacular performer for the last 5 years. They don't get supplemental summer water after establishment in full sun and free draining soil.

      K Forsyth
      Washington
      United States
      6 weeks ago
      Outstanding My favorite plant, I recommend to others all the time and explain the reasons why I like it so much.
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