Sunny Boulevard® St. John's Wort Hypericum kalmianum

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Exposure
  • Sun
Flower Season
  • Summer
Mature Size
Height: 2' - 3'
Spread: 2' - 3'

This plant is hardy in zones 4 - 8

Zones are based on the average annual extreme minimum 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 the number in the green box below is within the zone range listed for the plant, it will be hardy for you and thrive in your climate.

  • 4
  • 5
  • 6
  • 7
  • 8

What is my hardiness zone?

NORTH BAY, ONTARIO 
ZONE 4
  • FEATURES

    Easy, durable yellow flowers all summer long.

    This tightly branched shrub is noted for its long bloom time, beginning in July and continuing until September. The flowers are rich yellow, small but numerous, and the leaves are willow-like. This is an excellent plant for adding bright color to landscapes all summer long. Native to North America. Blue Ribbon Winner, UC Davis Landscape Irrigation Trials.

    Winter Interest
    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 Inches61cm - 91cm
    Spacing: 
    36 - 48 Inches 91cm - 1.2m
    Spread: 
    24 - 36 Inches 61cm - 91cm
    Flower Colors: 
    Yellow
    Flower Shade: 
    Yellow
    Foliage Colors: 
    Green
    Foliage Shade: 
    Dark Green
    Habit: 
    Mounded
    Container Role: 
    Thriller

    PLANT NEEDS

    Light Requirement: 
    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).

    Maintenance Category: 
    Easy
    Blooms On: 
    New Wood
    Bloom Time: 
    Early Summer
    Mid Summer
    Late Summer
    Hardiness Zones: 
    4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b
    Water Category: 
    Average
    Uses: 
    Container
    Landscape
    Mass Planting
    Uses Notes: 

    Groupings, masses, perennial or shrub borders, hedges. Great for adding bright summer color to the garden.

    Maintenance Notes: 

    Easily grown in average, medium, well-drained soils. Prefers rich, sandy loams. Tolerant of some drought. Northern gardeners should mulch roots in the winter. Fertilize in early spring by applying a slow release fertilizer specialized for trees & shrubs. Follow the label for recommended rate of application. Prune as needed to shape after flowering.

    Sunny Boulevard® Hypericum kalmianum 'Deppe' USPP 20,045, Can 3,587
    PICTURES AND INFORMATION COPIED FROM PROVEN WINNERS